discontinued / server · Files

index.html 124 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html401/strict.dtd">
<!-- the command line to process is this is:

     num -l 2 template.html | toc -l 2 | perl bin/htmlindex | perl \
       bin/propindex | perl bin/addcite -r '' template.html \
       >template-processed.html

     To do: add longdesc

-->

<html>
<head>
<meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type">

<meta content="text/css" http-equiv="Content-Style-Type">

<meta content="en" http-equiv="Content-Language">

<meta content="Tantek &Ccedil;elik" lang="tr" name="author">

<title>CSS3 Basic User Interface Module</title>

<link href="default.css" rel="stylesheet" title="Default" type="text/css">

<style type="text/css">
.subtoc ul,.subtoc ol { list-style-type: none }
ol.objectives { list-style: decimal }
ol.issues { list-style: decimal }
.html4ss { font-size:90%}
table.twod { border: solid 2px #777; font-family:sans-serif; font-size:9px }
table.twod td { border: solid 1px #777; font-family:sans-serif; font-size:9px }
table.twod th { font-size:10px; font-weight:bold }
h1 {font-size:200%; clear:both}
h2 {font-size:170%; clear:both}
h3 {font-size:150%; clear:both}
h4 {font-size:130%}
h5 {font-size:120%}
h6 {font-size:110%}
h1+h2 {page-break-before: avoid}
h2 {page-break-before: always}
dd p:first-child { margin-top:0 }

table.tprofile th.title {background:gray; color:white}
table.tprofile th { width:29%;padding:2px }
table.tprofile td { width:71%;padding:2px }

table#egappearance td:first-child { text-align:center; line-height:1.5 }
table#egappearance label { white-space:nowrap }
table#egappearance fieldset { line-height:1.4 }
table#egappearance legend { line-height:1.1 }

</style>

<link href="http://www.w3.org/StyleSheets/TR/W3C-CR" rel="stylesheet"
type="text/css">

<body>
<div class="head"> <a href="http://www.w3.org/"><img alt="W3C" height="48"
src="http://www.w3.org/Icons/w3c_home" width="72"> </a>
<h1 id="css3-basic">CSS3 Basic User Interface Module</h1>

<h2 class="no-num no-toc" id="w3c-candidate">W3C Candidate Recommendation 11
May 2004</h2>

<dl>
<dt>This version:

<dd><a
href="http://www.w3.org/TR/2004/CR-css3-ui-20040511">http://www.w3.org/TR/2004/CR-css3-ui-20040511</a>

<dt>Latest version:

<dd><a href="http://www.w3.org/TR/css3-ui">http://www.w3.org/TR/css3-ui</a>

<dt>Previous version:

<dd><a
href="http://www.w3.org/TR/2003/WD-css3-ui-20030703/">http://www.w3.org/TR/2003/WD-css3-ui-20030703/</a>

<dt>Editor:

<dd><span lang="tr">Tantek &Ccedil;elik</span> (<span class="company"><a
href="http://www.microsoft.com/">Microsoft Corporation</a></span>) &lt;<a
href="mailto:tantekc@microsoft.com">tantekc@microsoft.com</a>&gt;
</dl>
<!--begin-include "../copyright.inc"-->
<p class="copyright"><a
href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright"> Copyright</a>
&copy; 2004 <a href="http://www.w3.org/"><abbr title="World Wide Web
Consortium">W3C</abbr></a><sup>&reg;</sup> (<a
href="http://www.csail.mit.edu/"><abbr title="Massachusetts Institute of
Technology">MIT</abbr></a>, <a href="http://www.ercim.org/"><acronym
title="European Research Consortium for Informatics and
Mathematics">ERCIM</acronym></a>, <a href="http://www.keio.ac.jp/">Keio</a>),
All Rights Reserved. W3C <a
href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
<a
href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a>,
<a href="http://www.w3.org/Consortium/Legal/copyright-documents">document
use</a> and <a
href="http://www.w3.org/Consortium/Legal/copyright-software">software
licensing</a> rules apply.</p>
<!--end-include-->
<hr title="Separator for header">
</div>

<h2 class="no-num no-toc" id="abstract">Abstract</h2>

<p>This section is <em>informative</em>.

<p>CSS (Cascading Style Sheets) is a language for describing the rendering of
HTML and XML documents on screen, on paper, in speech, etc. It uses various
selectors, properties and values to style basic user interface elements in a
document. This specification describes those user interface related
selectors, properties and values that are proposed for CSS level&nbsp;3 to
style HTML and XML (including XHTML and XForms). It includes and extends user
interface related features from the selectors, properties and values of CSS
level&nbsp;2 revision 1 and Selectors specifications.

<h2 class="no-num no-toc" id="status" style="page-break-before:auto">Status
of this document</h2>

<p>This section is <em>normative</em>.

<p><em>This section describes the status of this document at the time of its
publication. Other documents may supersede it. A list of current W3C
publications and the latest revision of this technical report can be found in
the <a href="http://www.w3.org/TR/">W3C technical reports index at
http://www.w3.org/TR/</a>.</em>

<p>This is a W3C Candidate Recommendation, which means the specification has
been widely reviewed and W3C recommends that it be implemented. It will
remain Candidate Recommendation <a href="#crec">at least until 11 November
2004.</a>

<p>Publication as a Candidate Recommendation does not imply endorsement by
the W3C Membership. It is inappropriate to cite this document as other than
work in progress.

<p>To find the latest version of this specification, please follow the
"Latest version" link above, or visit the list of W3C <a
href="http://www.w3.org/TR">Technical Reports</a>.

<p>A <a href="/Style/CSS/Test/">test suite</a> and a <a
href="/Style/css3-updates/css3-ui-implementations">report on
implementations</a> will be provided before the document becomes a Proposed
Recommendation.

<p>The (<a
href="http://lists.w3.org/Archives/Public/www-style/">archived</a>) public
mailing list <a href="mailto:www-style@w3.org">www-style@w3.org</a> (see <a
href="http://www.w3.org/Mail/Request">instructions</a>) is preferred for
discussion of this and other specifications in the Style area. When
commenting on this document, please put the text "CSS3UI" in the subject,
preferably like this: "[CSS3UI] &lt;summary of comment&gt;"

<p>This document is produced by the <a
href="http://www.w3.org/Style/CSS/members">CSS Working Group</a> (part of the
<a href="http://www.w3.org/Style/">Style Activity</a>, see <a
href="http://www.w3.org/Style/Activity">summary</a>).

<p>Patent disclosures relevant to CSS may be found on the Working Group's
public <a href="http://www.w3.org/Style/CSS/Disclosures">patent disclosure
page.</a> The document was developed under the <a
href="http://www.w3.org/TR/2002/NOTE-patent-practice-20020124">24 January
2002 CPP</a> as amended by the <a
href="http://www.w3.org/2004/02/05-pp-transition">W3C Patent Policy
Transition Procedure.</a>

<h3 class="no-num no-toc" id="crec">Candidate Recommendation Exit Criteria</h3>

<p>For this specification to exit the CR stage, the following conditions must
be met:

<ol>
<li>
<p>There must be at least two interoperable implementations for every
feature. For the purposes of this criterion, we define the following terms:</p>

<dl>
<dt>feature

<dd>
<p> A section or subsection of the specification.</p>

<dt>interoperable

<dd>
<p>passing the respective test cases in the test suite, or, if the
implementation is not a web browser, equivalent tests. Every relevant test in
the test suite should have an equivalent test created if such a user agent
(UA) is to be used to claim interoperability. In addition if such a UA is to
be used to claim interoperability, then there must one or more additional UAs
which can also pass those equivalent tests in the same way for the purpose of
interoperability. The equivalent tests must be made publicly available for
the purposes of peer review.</p>

<dt>implementation

<dd>
<p>a user agent which:</p>

<ol>
<li>implements the feature.

<li>is available (i.e. publicly downloadable or available through some other
public point of sale mechanism). This is the "show me" requirement.

<li>is shipping (i.e. development, private or unofficial versions are
insufficient).

<li>is not experimental (i.e. is intended for a wide audience and could be
used on a daily basis).
</ol>
</dl>

<li>
<p>A minimum of six months of the CR period must have elapsed. This is to
ensure that enough time is given for any remaining major errors to be caught.

<li>
<p>The CR period will be extended if implementations are slow to appear.

<li>
<p>Features that are <em>at risk</em> (see the below list) will be dropped
(thus reducing the list of "all" features mentioned above) if two or more
interoperable implementations of those features are not found by the end of
the CR period, or if sufficient and adequate tests (by judgment of the
Working Group) have not been produced for those features by the end of the CR
period.
</ol>

<h3 class="no-num no-toc" id="atrisk">Features at risk</h3>

<p>The Working Group has identified the following features as at risk of
being removed from CSS3 Basic User Interface when exiting CR. Implementors
are urged to implement these features, if they wish to see these features
remain in this specification. All other features are either defined in a
normative reference (e.g. CSS 2.1 <a href="#CSS21"
rel="biblioentry">[CSS21]</a> or Selectors <a href="#SELECT"
rel="biblioentry">[SELECT]</a>), or dependencies for another specification
(e.g. XForms <a href="#XFORMS10" rel="biblioentry">[XFORMS10]</a>) or are
believed to have one or more implementations (perhaps experimental), and thus
will not be dropped without returning to last call.

<ul><!-- Not at risk:
 <li>CSS2.1:  		:hover :active :focus</li>
 <li>Selectors:		:enabled :disabled :checked :indeterminate ::selection</li>
 <li>XForms needs:	:default :valid :invalid :in-range :out-of-range :required :optional :read-only :read-write ::value ::choices ::repeat-item ::repeat-index</li>

 <li>appearance:
	 	Moz implements: 
	 		checkbox tab tooltip window dialog menubar
	 		none(same as normal) button(same as push-buttom) radio(same as radio-button) menupopup(same as pop-up-menu) menuitem(same as menu-item)
	 		checkboxcontainer(same as checkbox-group?) radiocontainer(same as radio-group?)
	 		treeview(same as outline-tree?) textfield(same as field) menulist(same as list-menu?) slider(same as range?) menulist(same as pull-down-menu?)
	 		listbox? listitem? 
	 		hyperlink (with a different mechanism?)
	 	XForms asked for and/or needs:
	 		combo-box signature password
 		Required generic values:
 			icon button menu
 		Necessary to replace old CSS3 Color values, so they can be deprecated
 			document workspace desktop
 </li>
 <li>box-sizing implemented by IE5/Mac, Opera
 		-moz-box-sizing implemented by Mozilla
 </li>
 <li>outline, outline-width, outline-color, outline-style all in CSS 2.1</li>
 <li>outline-offset property
 		implemented by Safari 1.2
 </li>
 <li>cursor property:
 		CSS2.1: auto | default | help | pointer | wait | crosshair | text | 
e-resize | n-resize | ne-resize | nw-resize | s-resize | se-resize | sw-resize | w-resize
		IE5/Mac implements: none | progress | cell
		IE6/Windows implements: <uri> | progress | not-allowed | no-drop | vertical-text | all-scroll | col-resize | row-resize | move | 
		Mozilla implements: progress | cell(as -moz-cell) | alias(as -moz-alias) | copy(as -moz-copy) | context-menu(as -moz-context-menu) | 
		freedesktop.org copied all the cursors from the CSS3-UI LC Working Draft
			by FredrikHoeglund - 14 Oct 2003 
			http://freedesktop.org/Standards/cursor-spec
 </li>
 <li>nav-* properties
 		implemented by Tasman v1, internal implementation
 		required (depended on) by DVB-HTML, ATSC standards
 </li> 
 -->

<li>'cursor' property values: ew-resize | ns-resize | nesw-resize |
nwse-resize

<li>'font' property values: window | document | workspace | desktop | tooltip
| dialog | button | push-button | hyperlink | radio-button | checkbox |
menu-item | tab | menubar | pull-down-menu | pop-up-menu | list-menu |
radio-group | checkbox-group | outline-tree | range | field | combo-box |
signature | password

<li>'content' property value: icon

<li>'icon' property

<li>'resize' property
</ul>

<h2 class="no-num no-toc" id="summary">Overview</h2>

<p>This section is <em>informative</em>.

<p>This document is one of the "modules" for the upcoming CSS3 specification.
It not only describes the user interface related properties and values that
already exist in <a href="http://www.w3.org/TR/REC-CSS1">CSS1</a> <a
href="#CSS1" rel="biblioentry">[CSS1]</a> and <a
href="http://www.w3.org/TR/CSS21">CSS2.1</a> <a href="#CSS21"
rel="biblioentry">[CSS21]</a>, but introduces new properties and values for
CSS3 as well. The Working Group doesn't expect that all implementations of
CSS3 will implement all properties or values. Instead, there will probably be
a small number of variants of CSS3, so-called "profiles".

<p>This document is the result of the merging of relevant parts of the
following Recommendations and Working Drafts, and the addition of some new
features.

<ul>
<li>Cascading Style Sheets, level 2, revision 1 <a href="#CSS21"
rel="biblioentry">[CSS21]</a>

<li>User Interface for CSS3 (16 February 2000) <a href="#CSSUI"
rel="biblioentry">[CSSUI]</a>
</ul>

<p>This specification contains:

<ul>
<li>Pseudo-classes and pseudo-elements to style user interface states and
element fragments respectively.

<li>Additions to the user interface features in <a
href="http://www.w3.org/TR/CSS21">CSS2.1</a>.

<li>The ability to style the appearance of various standard form elements in
languages such as HTML/XHTML/XForms (and properties to augment or replace
some of the remaining stylistic attributes in HTML4/XHTML1).

<li>Directional focus navigation properties.

<li>A mechanism to allow the styling of elements as icons for accessibility.
</ul>

<h2 class="no-num no-toc" id="contents">Table of contents</h2>
<!--begin-toc-->

<ul class="toc">
<li><a href="#intro"><span class="secno">1. </span>Introduction</a>
<ul class="toc">
<li><a href="#purpose"><span class="secno">1.1. </span>Purpose</a>

<li><a href="#scope"><span class="secno">1.2. </span>Scope</a>
</ul>

<li><a href="#conformance"><span class="secno">2. </span>Conformance</a>
<ul class="toc">
<li><a href="#definitions"><span class="secno">2.1. </span>Definitions</a>

<li><a href="#classes"><span class="secno">2.2. </span>Classes of
products</a>

<li><a href="#profiles"><span class="secno">2.3. </span>Profiles</a>

<li><a href="#extensions"><span class="secno">2.4. </span>Extensions</a>
</ul>

<li><a href="#dependencies"><span class="secno">3. </span>Dependencies on
other modules</a>

<li><a href="#user-interface"><span class="secno">4. </span>User Interface
Selectors</a>
<ul class="toc">
<li><a href="#pseudo-classes"><span class="secno">4.1. </span>User interface
states: pseudo-classes</a>
<ul class="toc">
<li><a href="#active"><span class="secno">4.1.1. </span>:active details</a>

<li><a href="#pseudo-default"><span class="secno">4.1.2. </span>:default</a>

<li><a href="#pseudo-validity"><span class="secno">4.1.3.
</span><span>:valid</span> and <span>:invalid</span></a>

<li><a href="#pseudo-range"><span class="secno">4.1.4.
</span><span>:in-range</span> and <span>:out-of-range</span></a>

<li><a href="#pseudo-required-value"><span class="secno">4.1.5.
</span><span>:required</span> and <span>:optional</span></a>

<li><a href="#pseudo-ro-rw"><span class="secno">4.1.6.
</span><span>:read-only</span> and <span>:read-write</span></a>
</ul>

<li><a href="#pseudo-elements"><span class="secno">4.2. </span>User interface
element fragments: pseudo-elements</a>
<ul class="toc">
<li><a href="#pseudo-value"><span class="secno">4.2.1. </span>::value</a>

<li><a href="#pseudo-choices"><span class="secno">4.2.2. </span>::choices</a>

<li><a href="#pseudo-repeat-item"><span class="secno">4.2.3.
</span>::repeat-item</a>

<li><a href="#pseudo-repeat-index"><span class="secno">4.2.4.
</span>::repeat-index</a>
</ul>
</ul>

<li><a href="#system"><span class="secno">5. </span>System Appearance</a>
<ul class="toc">
<li><a href="#appearance-val"><span class="secno">5.1. </span>Appearance
values</a>

<li><a href="#appearance"><span class="secno">5.2. </span><span
class="property">'appearance'</span> property</a>

<li><a href="#system0"><span class="secno">5.3. </span>System fonts</a>
</ul>

<li><a href="#element"><span class="secno">6. </span>Element icons</a>
<ul class="toc">
<li><a href="#content0"><span class="secno">6.1. </span><span
class="property">'content'</span> property addition</a>

<li><a href="#icon-property"><span class="secno">6.2. </span><span
class="property">'icon'</span> property</a>
</ul>

<li><a href="#box-model"><span class="secno">7. </span>Box Model addition</a>

<ul class="toc">
<li><a href="#box-sizing"><span class="secno">7.1. </span><span
class="property">'box-sizing'</span> property</a>
</ul>

<li><a href="#outline1"><span class="secno">8. </span>Outline properties</a>
<ul class="toc">
<li><a href="#outline"><span class="secno">8.1. </span><span
class="property">'outline'</span> property</a>

<li><a href="#outline-width"><span class="secno">8.2. </span><span
class="property">'outline-width'</span> property</a>

<li><a href="#outline-style"><span class="secno">8.3. </span><span
class="property">'outline-style'</span> property</a>

<li><a href="#outline-color"><span class="secno">8.4. </span><span
class="property">'outline-color'</span> property</a>

<li><a href="#outline-offset"><span class="secno">8.5. </span><span
class="property">'outline-offset'</span> property</a>
</ul>

<li><a href="#resizing"><span class="secno">9. </span>Resizing</a>
<ul class="toc">
<li><a href="#resize"><span class="secno">9.1. </span><span
class="property">'resize'</span> property</a>
</ul>

<li><a href="#mouse"><span class="secno">10. </span>Mouse and Keyboard</a>
<ul class="toc">
<li><a href="#cursor"><span class="secno">10.1. </span><span
class="property">'cursor'</span> property</a>

<li><a href="#keyboard"><span class="secno">10.2. </span>Keyboard control</a>

<ul class="toc">
<li><a href="#nav-index"><span class="secno">10.2.1. </span>Sequential
navigation order: the <span class="property">'nav-index'</span> property</a>

<li><a href="#nav-dir"><span class="secno">10.2.2. </span>Directional focus
navigation: the <span class="property">'nav-up'</span>, <span
class="property">'nav-right'</span>, <span
class="property">'nav-down'</span>, <span class="property">'nav-left'</span>
properties</a>
</ul>
</ul>

<li><a href="#acknowledgments">Appendix A. Acknowledgments</a>

<li><a href="#references">Appendix B. Bibiliography</a>

<li><a href="#changes">Appendix C. Changes</a>

<li><a href="#appendix">Appendix D. Default style sheet additions for
HTML4/XHTML1</a>

<li><a href="#appendix0">Appendix E. Example profiles</a>

<li><a href="#appendix1">Appendix F: Test Suite</a>

<li><a href="#index">Index</a>

<li><a href="#property">Property index</a>
</ul>
<!--end-toc-->

<hr>

<h2 id="intro"><span class="secno">1. </span>Introduction</h2>

<p>This section is <em>normative</em>.

<p> CSS3 is a set of modules, divided up and profiled in order to simplify
the specification, and to allow implementors the flexibility of supporting
the particular modules appropriate for their implementations.

<p> This module describes selectors and CSS properties which enable authors
to style user interface related states, element fragments, properties and
values.

<p><a href="http://www.w3.org/TR/REC-CSS1#anchor-pseudo-classes">Section 2.1
of CSS1</a> <a href="#CSS1" rel="biblioentry">[CSS1]</a> and <a
href="http://www.w3.org/TR/CSS2/ui.html">Chapter 18 of CSS2</a> <a
href="#CSS2" rel="biblioentry">[CSS2]</a> introduced several user interface
related pseudo-classes, properties and values. <a
href="http://www.w3.org/TR/css3-selectors/#UIstates">Section 6.6.4 of
Selectors</a> <a href="#SELECT" rel="biblioentry">[SELECT]</a> also describes
several additional user interface related pseudo-classes (and one
pseudo-element).

<p> This Working Draft extends them to provide the ability, through CSS, to
style elements based upon additional user interface states, to style
fragments of user interface elements, and to alter the dynamic presentation
of elements in ways previously only available through specific HTML4/XHTML1
elements and attributes.

<h3 id="purpose"><span class="secno">1.1. </span>Purpose</h3>

<p>The purpose of this specification is to achieve the following objectives:

<ul>
<li>Extend the user interface features in CSS2.1.

<li>Provide additional CSS mechanisms to simulate the appearance of various
standard form elements.

<li>Provide additional CSS mechanisms to augment or replace other dynamic
presentation related features in HTML4/XHTML1.

<li>Introduce directional navigation properties to assist in the construction
of user interfaces which make use of a directional navigation model.

<li>Introduce properties and values to specify icon presentations for
elements to enhance accessibility.
</ul>

<h3 id="scope"><span class="secno">1.2. </span>Scope</h3>

<p>This proposal specifies how to alter the look and feel of various
elements, and specifically does not address the meaning behind what a
specific look and feel may imply. For example, with the additions in the
proposal, an author can make any element look and even feel like a submit
button. Yet, that arbitrary element is not afforded any additional meaning,
so pushing it does nothing by default, and certainly does not submit a form.

<p> Similarly, the HTML4 <code>&lt;SELECT&gt;</code> element for example,
provides a list or menu of choices to the user. The meaning of the HTML4
<code>&lt;SELECT&gt;</code> element is that it allows the user to make a
choice, to choose something among several alternatives. This says nothing
about its look and feel, and in fact, the "concept" of a HTML4
<code>&lt;SELECT&gt;</code> could be visually implemented as a list-box, a
popup-menu, or a group of radio-buttons. Or a group of HTML4 checkboxes
(<code>&lt;INPUT type="checkbox"&gt;</code>) could be styled to appear as a
group of radio-buttons, and yet, since those elements are still semantic
checkboxes, they can still be individually checked or unchecked, rather than
acquiring any kind of radio-button group semantic where only one can be
checked.

<p> Each example of presentation has a different look and feel, but maintains
its original meaning, a choice (or choices) among several alternatives. This
proposal addresses only the former (look and feel), not the latter (meaning).

<p> Since this proposal serves to simulate the appearance of various user
interface and forms elements in HTML4/XHTML, it is perhaps useful to call out
what specifically is believed to be outside the scope of CSS, or better
suited to document structure rather than style and therefore not addressed by
this proposal:

<ul>
<li>Form semantics, including, but not limited to, submission, resetting,
naming, what determines a successful or valid form control, and how to
process form data.

<li>Form contents, including, but not limited to initial value, current
value, and form content types. The HTML4 '<code>maxlength</code>' attribute,
for example, determines the maximum number of characters the user can enter
into an <code>&lt;INPUT type="text"&gt;</code> or <code>&lt;INPUT
type="password"&gt;</code> field, and as such is a content constraint rather
than a presentational suggestion.

<li>Form control dependencies, including, but not limited to, whether only
one option from a set of choices may be chosen, or whether multiple options
may be chosen.

<li>The HTML4/XHTML1 <code>&lt;form&gt;</code> element and its unique
attributes ('<code>action</code>', '<code>method</code>',
'<code>enctype</code>', '<code>accept</code>',
'<code>accept-charset</code>').
</ul>

<p>In addition, this document does not attempt to solve all user interface
related issues / features that can be found in modern user interfaces.
Perhaps future versions may attempt to solve these. For example:

<ul>
<li>Complex or composite controls (e.g. the HTML4 <code>&lt;INPUT
type="file"&gt;</code> and the <code>&lt;ISINDEX&gt;</code> elements).

<li>The appearance, styling and coloring of scrollbars.

<li>Window layering. There is no attempt made to distinguish the appearance
of elements in the front-most window versus non-front-most windows. The
semantics of window layering must be addressed before it is appropriate to
attempt to style such concepts.

<li>Palettes and floating windows. Along with the concept of "frontmost"
window, windows that float but do not receive focus are also not addressed.

<li>Browser window chrome and toolbars.

<li>The default styling of the HTML4/XHTML1 <code>&lt;fieldset&gt;</code>,
<code>&lt;legend&gt;</code>, <code>&lt;frame&gt;</code> and
<code>&lt;frameset&gt;</code> elements.

<li>Frame-resizing behavior. The behavior of <code>&lt;frame&gt;</code> and
<code>&lt;frameset&gt;</code>, specifically the ability to "share"
resizability when elements share a border, perhaps by leveraging the
border-collapse property is also not addressed.
</ul>

<h2 id="conformance"><span class="secno">2. </span>Conformance</h2>

<p>This section is <em>normative</em>.

<h3 id="definitions"><span class="secno">2.1. </span>Definitions</h3>

<p>The key words <span class="index-def" id="must"
title="MUST">"MUST"</span>, <span class="index-def" id="must-not" title="MUST
NOT">"MUST NOT"</span>, <span class="index-def" id="required"
title="REQUIRED">"REQUIRED"</span>, <span class="index-def" id="shall"
title="SHALL">"SHALL"</span>, <span class="index-def" id="shall0"
title="SHALL NOT">"SHALL NOT"</span>, <span class="index-def" id="should"
title="SHOULD">"SHOULD"</span>, <span class="index-def" id="should0"
title="SHOULD NOT">"SHOULD NOT"</span>, <span class="index-def"
id="recommended" title="RECOMMENDED">"RECOMMENDED"</span>, <span
class="index-def" id="may" title="MAY">"MAY"</span>, and <span
class="index-def" id="optional" title="OPTIONAL">"OPTIONAL"</span> in this
document are to be interpreted as described in RFC&nbsp;2119 (see <a
href="#RFC2119" rel="biblioentry">[RFC2119]</a>). However, for readability,
these words do not typically appear in all uppercase letters in this
specification.

<p>Additional key words, e.g. "User agent (UA)", are <a
href="http://www.w3.org/TR/CSS21/conform.html#q1">defined by CSS 2.1</a> (<a
href="#CSS21" rel="biblioentry">[CSS21]</a>, section 3.1).

<h3 id="classes"><span class="secno">2.2. </span>Classes of products</h3>

<p>The following classes of products (many of which overlap) should consider
implementing this specification:

<ul>
<li>Web browsers

<li>User agents that implement one or more of the following types of content:
HTML (e.g. <a href="#HTML401" rel="biblioentry">[HTML401]</a>), XHTML (e.g.
<a href="#XHTML10" rel="biblioentry">[XHTML10]</a>, <a href="#XHTML11"
rel="biblioentry">[XHTML11]</a>), XForms (e.g. <a href="#XFORMS10"
rel="biblioentry">[XFORMS10]</a>), SVG (e.g. <a href="#SVG10"
rel="biblioentry">[SVG10]</a>, <a href="#SVG11"
rel="biblioentry">[SVG11]</a>) or other content languages that contain forms
controls or are intended for user interaction

<li>User agents that implement one or more levels, modules and or profiles of
CSS (e.g. <a href="#CSS1" rel="biblioentry">[CSS1]</a>, <a href="#CSS21"
rel="biblioentry">[CSS21]</a>)
</ul>

<h3 id="profiles"><span class="secno">2.3. </span>Profiles</h3>

<p>This specification contains a number of informative profiles. These
profiles are not mandatory for conformance.

<h3 id="extensions"><span class="secno">2.4. </span>Extensions</h3>

<p>This specification does not define any explicit extension mechanisms. If
an implementation needs to extend the functionality of this specification, it
must follow any/all guidelines and requirements of extensions as defined in
CSS2.1, e.g. <a
href="http://www.w3.org/TR/CSS21/syndata.html#q4">Vendor-specific
extensions</a> (<a href="#CSS21" rel="biblioentry">[CSS21]</a>, section
4.1.2).

<h2 id="dependencies"><span class="secno">3. </span>Dependencies on other
modules</h2>

<p>This section is <em>normative</em>.

<p>This CSS3 module depends on the following other specifications. Some of
these specifications may be in their "Candidate Recommendation" phase. If
this module depends on feature or portion of such a specification which ends
up being dropped during their "CR" phase(s), then such feature or portion
thereof will be presumed to be incorporated into this specification. For
example, if the ":indeterminate" selector was dropped from Selectors, then
the definition and description of ":indeterminate" would be incorporated into
the next draft of this specification.

<ul>
<li><a href="#SELECT" rel="biblioentry">[SELECT]</a>

<li><a href="#CSS3COLOR" rel="biblioentry">[CSS3COLOR]</a>

<li><a href="#CSS21" rel="biblioentry">[CSS21]</a>
</ul>
<!--
<p>It has non-normative (informative) references to the following
other specifications:</p>
<ul>
</ul>
-->

<p> The following work is related to the CSS3 Module Basic User Interface
Working Draft.

<ul>
<li><a href="#HTML401" rel="biblioentry">[HTML401]</a>

<li><a href="#UAAG10" rel="biblioentry">[UAAG10]</a>

<li><a href="#XML10" rel="biblioentry">[XML10]</a>

<li><a href="#XHTML10" rel="biblioentry">[XHTML10]</a>

<li><a href="#XHTML11" rel="biblioentry">[XHTML11]</a>

<li><a href="#XFORMS10" rel="biblioentry">[XFORMS10]</a>
</ul>

<p>This specification does not define what is a form element.

<h2 id="user-interface"><span class="secno">4. </span>User Interface
Selectors</h2>

<p>This section is <em>normative</em>.

<h3 id="pseudo-classes"><span class="secno">4.1. </span>User interface
states: pseudo-classes</h3>

<p>The Selectors specification <a
href="http://www.w3.org/TR/css3-selectors/#UIstates">defines several user
interface selectors</a> (<a href="#SELECT" rel="biblioentry">[SELECT]</a>,
sections 6.6.1 and 6.6.4) which represent user interface states:

<ul>
<li id="psuedo-hover"><a
href="http://www.w3.org/TR/css3-selectors/#useraction-pseudos">:hover</a>

<li id="pseudo-active"><a
href="http://www.w3.org/TR/css3-selectors/#useraction-pseudos">:active</a>

<li id="pseudo-focus"><a
href="http://www.w3.org/TR/css3-selectors/#useraction-pseudos">:focus</a>

<li id="pseudo-enabled"><a
href="http://www.w3.org/TR/css3-selectors/#enableddisabled">:enabled</a>

<li id="pseudo-disabled"><a
href="http://www.w3.org/TR/css3-selectors/#enableddisabled">:disabled</a>

<li id="pseudo-checked"><a
href="http://www.w3.org/TR/css3-selectors/#checked">:checked</a>

<li id="pseudo-indeterminate"><a
href="http://www.w3.org/TR/css3-selectors/#indeterminate">:indeterminate</a>
</ul>

<p>These pseudo-classes as defined by <a href="#SELECT"
rel="biblioentry">[SELECT]</a> are included in this specification by
reference.

<p>CSS 2.1 <a href="#CSS21" rel="biblioentry">[CSS21]</a> specifies
additional details for some of the selectors mentioned, above and beyond
Selectors.

<h4 id="active"><span class="secno">4.1.1. </span>:active details</h4>

<p>In addition, on systems with more than one mouse button, :active is
clarified to apply only to the primary or primary activation button
(typically the "left" mouse button), and any aliases thereof.

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="restyling">restyling a checkbox</h4>

<p> Authors may wish to completely redo the styling of a form control, such
as a checkbox. This can be achieved using several of the above pseudo-classes
and the '<span class="value">normal</span>' value for the <span
class="property"><a href="#appearance0">'appearance'</a></span> property
which is explained later in this specification. In this example, checkboxes
with a class of "redone" are styled with specific background images according
to their respective user interface states using one or more pseudo-classes.</p>

<pre><code class="css">
input[type=checkbox] { 
  appearance:checkbox; /* expected from UA defaults */
}

input[type=checkbox].redone { 
  appearance:normal;  /* resets various properties */
  display:inline-block;
  width:20px; height:20px; 
  background:url(customuncheckedimage.png);
}

input[type=checkbox].redone:active {
  background:url(customuncheckedactiveimage.png);
}

input[type=checkbox].redone:checked {
  background:url(customcheckedimage.png);
}

input[type=checkbox].redone:checked:active {
  background:url(customcheckedactiveimage.png);
}

input[type=checkbox].redone:disabled {
  background:url(customdisableduncheckedimage.png);
}

input[type=checkbox].redone:disabled:checked {
  background:url(customdisabledcheckedimage.png);
}
</code></pre>
</div>

<h4 class="no-num no-toc" id="new-user">New user interface state
pseudo-classes</h4>

<p>In addition to the above-mentioned pseudo-classes, this specification
introduces several new pseudo-classes to define additional user interface
states.

<ul>
<li>:default

<li>:valid

<li>:invalid

<li>:in-range

<li>:out-of-range

<li>:required

<li>:optional

<li>:read-only

<li>:read-write
</ul>

<p>Specifically, these new states (except for :default) are provided as a way
to style elements which are in the respective states as defined by XForms <a
href="#XFORMS10" rel="biblioentry">[XFORMS10]</a>.

<h4 id="pseudo-default"><span class="secno">4.1.2. </span>:default</h4>

<p>The :default selector applies to the one or more UI elements that are the
default among a set of similar elements. Typically applies to context menu
items, buttons and select lists/menus.

<p> One example is the default submit button among a set of buttons. Another
example is the default option from a popup menu. Multiple elements in a
select-many group could have multiple :default elements, like a selection of
pizza toppings for example.

<h4 id="pseudo-validity"><span class="secno">4.1.3. </span><span
id="pseudo-valid">:valid</span> and <span id="pseudo-invalid">:invalid</span></h4>

<p>An element is :valid or :invalid when it is, respectively, valid or
invalid with respect to data validity semantics defined by a different
specification (e.g. <a href="#XFORMS10" rel="biblioentry">[XFORMS10]</a>). An
element which lacks data validity semantics is neither :valid nor :invalid.
This is different from an element which otherwise has no constraints. Such an
element would always be :valid.

<h4 id="pseudo-range"><span class="secno">4.1.4. </span><span
id="pseudo-in-range">:in-range</span> and <span
id="pseudo-out-of-range">:out-of-range</span></h4>

<p> The :in-range and :out-of-range pseudo-classes apply only to elements
that have range limitations. An element is :in-range or :out-of-range when
the value that the element is bound to is in range or out of range of the
presentation (e.g. visual or spoken representation) of the element
respectively. An element that lacks data range limits or is not a form
control is neither :in-range nor :out-of-range. E.g. a slider element with a
value of 11 presented as a slider control that only represents the values
from 1-10 is :out-of-range. Another example is a menu element with a value of
"E" that happens to be presented as a popup menu that only has choices "A",
"B" and "C".

<h4 id="pseudo-required-value"><span class="secno">4.1.5. </span><span
id="pseudo-required">:required</span> and <span
id="pseudo-optional">:optional</span></h4>

<p>A form element is :required or :optional if a value for it is,
respectively, required or optional before the form it belongs to is
submitted. Elements that are not form elements are neither required nor
optional.

<h4 id="pseudo-ro-rw"><span class="secno">4.1.6. </span><span
id="pseudo-read-only">:read-only</span> and <span
id="pseudo-read-write">:read-write</span></h4>

<p>An element whose contents are not user-alterable is :read-only. However,
elements whose contents are user-alterable (such as text input fields) are
considered to be in a :read-write state. In typical documents, most elements
are :read-only. However it may be possible (e.g. in the context of an editor)
for any element to become :read-write.

<h3 id="pseudo-elements"><span class="secno">4.2. </span>User interface
element fragments: pseudo-elements</h3>

<p>Selectors (<a href="#SELECT" rel="biblioentry">[SELECT]</a>, section 7.3)
also defines one user interface element fragment selector:

<ul>
<li id="pseudo-selection"><a
href="http://www.w3.org/TR/css3-selectors/#selection">::selection</a>
</ul>

<p>This pseudo-element is included in this specification as defined by <a
href="#SELECT" rel="biblioentry">[SELECT]</a> by reference.

<p>In addition to the above-mentioned pseudo-element, this specification
introduces four new pseudo-elements to provide access to additional user
interface element fragments.

<ul>
<li>::value

<li>::choices

<li>::repeat-item

<li>::repeat-index
</ul>

<p>Specifically, these new pseudo-elements are provided as a way to style
user interface fragments as defined by XForms <a href="#XFORMS10"
rel="biblioentry">[XFORMS10]</a>.

<h4 id="pseudo-value"><span class="secno">4.2.1. </span>::value</h4>

<p>A form element may contain both a label for its data value, and the data
value itself. For such elements, the ::value pseudo-element selects the
representation of just the data value itself, in order to style its
appearance.

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="fictional">fictional markup and illustration</h4>

<p> Here is an example which illustrates the ::value of a text input field
with fictional markup which is then styled with CSS.</p>

<h5 class="no-num no-toc" id="sample">sample XForms fragment with fictional
markup:</h5>

<pre><code>
&lt;input&gt;
  &lt;label&gt;Zip code&lt;label&gt;
  <em>&lt;input::value/&gt;</em>
&lt;/input&gt;
</code></pre>

<h5 class="no-num no-toc" id="sample0">sample CSS:</h5>

<pre><code class="css">
input { border:dashed }
label { border:dotted }
input::value { border:solid }
</code></pre>

<h5 class="no-num no-toc" id="an-xhtmlcss">an (X)HTML+CSS approximation of
this example</h5>

<p> <span style="border:dashed;display:inline-block;padding:10px"> <label
style="border:dotted;display:inline-block;padding:2px;margin:0;font-size:1em">Zip
code</label> <input
style="border:solid;display:inline-block;padding:2px;margin:0;font-size:1em"
type="text" value="94117"> </span></p>

<p>Spacing (in the form of padding) has been added to the above approximation
to separate the borders and make the individual (pseudo-)elements easier to
distinguish.</p>
</div>

<h4 id="pseudo-choices"><span class="secno">4.2.2. </span>::choices</h4>

<p>Similarly, a form element which represents a list of options may contain
both a label for the list, and the list of choices itself. For such elements,
the ::choices pseudo-element selects the representation of just the list of
choices themselves, in order to style their appearance.

<p>A list of radio buttons can also be selected with the ::choices
pseudo-element, and the currently chosen radio button can be selected with
the ::value pseudo-element.

<h4 id="pseudo-repeat-item"><span class="secno">4.2.3. </span>::repeat-item</h4>

<p> The ::repeat-item pseudo-element represents a single item from a
repeating sequence. It is generated as a parent to all the elements in a
single repeating item. Each ::repeat-item is associated with a particular
instance data node, and is affected by the model item properties (e.g.
'<code>relevant</code>') found there, as the related style properties will
cascade to the child elements.

<h4 id="pseudo-repeat-index"><span class="secno">4.2.4. </span>::repeat-index</h4>

<p> The ::repeat-index pseudo-element represents the current item of a
repeating sequence. It takes the place of the ::repeat-item as a parent of
all the elements in the index repeating item.

<div class="note">
<p> <em><strong>Note.</strong> Any style declarations that an author wants to
apply to all repeat items, including the index, must be done so by using both
::repeat-item and ::repeat-index selectors. Styles that are only applied to
::repeat-item will not automatically be applied to the respective
::repeat-index. </em></p>
</div>

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="repeat-item">::repeat-item and ::repeat-index
fictional markup</h4>

<p> Here is an example that illustrates both ::repeat-item and
::repeat-index, since they are often both available and used at the same
time. Assume appropriate namespace declarations were made in a header
somewhere preceding the code in the example.</p>

<p>The following markup snippet uses XHTML and XForms:</p>

<pre><code lang="x-xhtml">
&lt;html:table xforms:repeat-nodeset="..."&gt;
   &lt;html:tr&gt;
      &lt;html:td&gt;&lt;xforms:input ref="..."/&gt;&lt;xforms:input ref="..."/&gt;&lt;/html:td&gt;
   &lt;/html:tr&gt;
&lt;/html:table&gt;
</code></pre>

<p> The following style rules are used to style all the repeated items and
the current repeated item.</p>

<pre><code class="css" lang="x-css">
html|tr::repeat-item { outline: medium solid; color:gray }
html|tr::repeat-index { outline: medium dashed; color:black }
</code></pre>

<p> The following fictional markup shows the state of the above markup when
through user interaction the XForm contains three of the repeated items,
where the third item is current.</p>

<pre><code lang="x-xhtml">
&lt;html:table xforms:repeat-nodeset="..."&gt;
 <em>&lt;html:tr::repeat-item&gt;</em>
  &lt;html:tr&gt;
   &lt;html:td&gt;&lt;xforms:input ref="..."/&gt;&lt;xforms:input ref="..."/&gt;&lt;/html:td&gt;
  &lt;/html:tr&gt;
 <em>&lt;/html:tr::repeat-item&gt;</em>
 <em>&lt;html:tr::repeat-item&gt;</em>
  &lt;html:tr&gt;
   &lt;html:td&gt;&lt;xforms:input ref="..."/&gt;&lt;xforms:input ref="..."/&gt;&lt;/html:td&gt;
  &lt;/html:tr&gt;
 <em>&lt;/html:tr::repeat-item&gt;</em>
 <em>&lt;html:tr::repeat-index&gt;</em>
  &lt;html:tr&gt;
   &lt;html:td&gt;&lt;xforms:input ref="..."/&gt;&lt;xforms:input ref="..."/&gt;&lt;/html:td&gt;
  &lt;/html:tr&gt;
 <em>&lt;/html:tr::repeat-index&gt;</em>
&lt;/html:table&gt;
</code></pre>
</div>

<div class="note">
<p> <em><strong>Note.</strong> The ::repeat-index pseudo-element takes the
place of the ::repeat-item rather than being nested inside as a separate
element. Thus just like :link or :visited are mutually exclusive for
selecting hyperlinks, only one will exist and apply to a particular repeated
item at any point.</em></p>
</div>

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="ui-selectors">UI selectors example from XForms
1.0</h4>

<p> The following <a
href="http://www.w3.org/TR/xforms/sliceF.html#id2645356">example from XForms
1.0</a> (<a href="#XFORMS10" rel="biblioentry">[XFORMS10]</a>, section F.3)
shows how basic styling can be accomplished on form controls and repeating
structures using the new pseudo-classes and XForms elements.</p>

<pre><code class="css">
@namespace xforms url(http://www.w3.org/2002/xforms);
/* Display a red background on all invalid form controls */
*:invalid { background-color:red; }
/* Display a red asterisk after all required form controls */
*:required::after { content: "*"; color:red; }
/* Do not render non-relevant form controls */
*:disabled { visibility: hidden; }
/* The following declarations cause form controls and their labels
to align neatly, as if a two-column table were used */
xforms|group { display: table; }
xforms|input { display: table-row; }
xforms|input &gt; xforms|label { display: table-cell; }
xforms|input::value { border: thin black solid; display: table-cell; }
/* Display an alert message when appropriate */
*:valid   &gt; xforms|alert { display: none; }
*:invalid &gt; xforms|alert { display: inline; }
/* Display repeat-items with a dashed border */
*::repeat-item,*::repeat-index { border: dashed; }
/* Display a teal highlight behind the current repeat item */
*::repeat-index { background-color: teal; }
</code></pre>
</div>

<h2 id="system"><span class="secno">5. </span>System Appearance</h2>

<p>This section is <em>normative</em>.

<h3 id="appearance-val"><span class="secno">5.1. </span>Appearance values</h3>

<p> CSS2 introduced the concept of system colors, which is a set of keywords
that allows authors to specify colors in a manner that integrates them into
the user's graphic environment. However, color is not the only property for
which native form controls have a default.

<p>The properties defined and extended in this section refer to the <dfn
id="ltappearancegt">&lt;appearance&gt;</dfn> value type, which may take one
of the following values which have been derived from the <a
href="http://www.w3.org/TR/CSS21/ui.html#system-colors">list of CSS2.1 System
Colors</a> (<a href="#CSS21" rel="biblioentry">[CSS21]</a>, section 18.2),
the list of <a href="http://www.w3.org/TR/html401/interact/forms.html">HTML4
form controls</a> (<a href="#HTML401" rel="biblioentry">[HTML401]</a>,
section 17), and additional typical platform user interface (UI) controls
(e.g. dialog window, icon):

<dl>
<dt><strong title="">icon</strong>

<dd>a small picture representing an object, often with a name or label.

<dt><strong>window</strong>

<dd>a viewport, a framed surface used to present objects and content for user
viewing and interaction. There are several specific types of windows:
<dl>
<dt><strong>desktop</strong>

<dd>a window used to represent a system as a whole that often contains other
windows.

<dt><strong>workspace</strong>

<dd>a window used to represent a project or application that may contain
other windows, typically with a titlebar that shows the name of the project
or application.

<dt><strong>document</strong>

<dd>a window used to represent a user document, typically with a titlebar
that shows its name. May also be used to represent folders or directories in
a file system.

<dt><strong>tooltip</strong>

<dd>a window that is used to temporarily display information or help about an
object. Also called "info" in the CSS2 system colors.

<dt><strong>dialog</strong>

<dd>a window used to present a notification or alternatives for the user to
choose as part of an action taken by the user. Also called "message-box" in
the CSS2 system fonts.
</dl>

<dt><strong>button</strong>

<dd>a small object usually labeled with text that represents a user choice
<dl>
<dt><strong>push-button</strong>

<dd>a button that has a border surrounding it, often beveled to appear three
dimensional, as if it is raised. Also called "caption" in CSS2 system fonts.

<dt><strong>hyperlink</strong>

<dd>a button that represents a hypertext link, often as simple as normal text
that is underlined and perhaps colored differently.

<dt><strong>radio-button</strong>

<dd>a button that displays whether or not it is checked with a small circle
next to the button label. There may be a disc inside the circle when the
button is checked. An indeterminate (neither checked nor unchecked) state may
be indicated with some other graphic in the circle.

<dt><strong>checkbox</strong>

<dd>a button that displays whether or not it is checked with a small box next
to the button label. There may be an 'x' or check mark inside the box when
the button is checked. An indeterminate (neither checked nor unchecked) state
may be indicated with a dash '-' or a square or some other graphic in the
box.

<dt><strong>menu-item</strong>

<dd>a choice within a menu, which may also act as a label for a nested
(hierarchical) menu.

<dt><strong>tab</strong>

<dd>a button representing the label for a pane in a tabbed interface.
</dl>

<dt><strong>menu</strong>

<dd>a set of options for the user to choose from, perhaps more than one at a
time. There are several specific types of menus.
<dl>
<dt><strong>menubar</strong>

<dd>a menu of menus, typically arranged linearly, in a horizontal bar.

<dt><strong>pull-down-menu</strong>

<dd>a menu where the name of the menu is displayed and the options remain
hidden until the user activates the menu. When the user releases or
deactivates the menu, the options are hidden again.

<dt><strong>pop-up-menu</strong>

<dd>a menu where all but the currently selected option remains hidden until
the user activates the menu. When the user releases or deactivates the menu,
all but the selected option are hidden again.

<dt><strong>list-menu</strong>

<dd>a list of options for the user to choose from, perhaps more than one at a
time.

<dt><strong>radio-group</strong>

<dd>a menu where the options are displayed as radio-buttons.

<dt><strong>checkbox-group</strong>

<dd>a menu where the options are displayed as checkboxes.

<dt><strong>outline-tree</strong>

<dd>a menu where the options can be shown or hidden with small widgets, often
represented by a small triangle or plus and minus signs.

<dt><strong>range</strong>

<dd>a control that displays the current option, perhaps graphically and
allows the user to select other options, perhaps by dragging a slider or
turning a knob.
</dl>

<dt><strong>field</strong>

<dd>an area provided for a user to enter or edit a value, typically using a
keyboard. There are several special fields.
<dl>
<dt><strong>combo-box</strong>

<dd>a field which is accompanied by a menu of preset values that can be used
to quickly enter common or typical values.

<dt><strong>signature</strong>

<dd>a field for entering a signature.

<dt><strong>password</strong>

<dd>a field for entering a password. Typically the text is rendered as a set
of bullets or boxes to obscure the value.
</dl>
</dl>

<p> Conforming user agents must support the five generic appearance values:
'<span class="value" title="">icon</span>', '<span
class="value">window</span>', '<span class="value">button</span>', '<span
class="value">menu</span>' and '<span class="property">field</span>'. If a
user agent or platform does not support a specific user interface element
(e.g. '<span class="value">dialog</span>'), it may apply the values for the
respective generic user interface element (e.g. '<span
class="value">window</span>').

<p class="note"><em><strong>Note.</strong> This specification recommends that
user agents allow users to override system appearance and font selections
with their own choices or proportions, within the user agent. See the User
Agent Accessibility Guidelines, specifically <a
href="http://www.w3.org/TR/UAAG10/guidelines.html#gl-user-control-styles">Ensure
user control of rendering</a> (<a href="#UAAG10"
rel="biblioentry">[UAAG10]</a>, section 2 guideline 4). </em>

<h3 id="appearance"><span class="secno">5.2. </span><span class="property"><a
href="#appearance0">'appearance'</a></span> property</h3>

<table class="propdef" id="nameappearance">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="appearance0">appearance</dfn>

<tr>
<td><em>Value: </em>

<td>normal | <a href="#appearance-val">&lt;appearance&gt;</a> | inherit

<tr>
<td><em>Initial:</em>

<td>normal

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual, interactive

<tr>
<td><em>Computed value:</em>

<td>specified value
</table>

<p>This document introduces the <span class="property"><a
href="#appearance0">'appearance'</a></span> property which can be used to
make an element look like a standard user interface element on the platform.

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="a-few">A few <span class="property"><a
href="#appearance0">'appearance'</a></span> values demonstrated using HTML4</h4>

<table border="1" id="egappearance">
<thead>
<tr>
<th style="width:10em"><span class="property"><a
href="#appearance0">'appearance'</a></span>

<th>HTML4 demonstration

<tbody>
<tr>
<td>normal

<td><span>hello</span>

<tr>
<td>button

<td>
<button>Search</button>

<tr>
<td>push-button

<td><input type="button" value="Sign up">

<tr>
<td>hyperlink

<td><a href="http://www.w3.org/Style/CSS/">CSS home page</a>

<tr>
<td>radio-button

<td><input id="sticky" type="radio"><label for="sticky">Sticky</label>

<tr>
<td>checkbox

<td><input id="giftwrap" type="checkbox"><label for="giftwrap">Gift
wrap</label>

<tr>
<td>pop-up-menu

<td><label for="pophoney">Honey</label> <select id="pophoney" size="1">
<option>Water White

<option>Extra White

<option>White

<option>Extra Light Amber

<option>Light Amber

<option selected>Amber

<option>Dark Amber
</select>

<tr>
<td>list-menu

<td> <label for="listhoney">Honey</label> <select id="listhoney" size="5">
<option>Water White

<option>Extra White

<option>White

<option>Extra Light Amber

<option>Light Amber

<option selected>Amber

<option>Dark Amber
</select>

<tr>
<td>radio-group

<td>
<fieldset>
<legend>tea</legend>
<input checked id="earl" name="teachoice" type="radio"><label for="earl">Earl
Grey</label> <input id="lemon" name="teachoice" type="radio"><label
for="lemon">lemon ginger</label> <input id="green" name="teachoice"
type="radio"><label for="green">green tea</label> <input id="jasmine"
name="teachoice" type="radio"><label for="jasmine">jasmine tea</label></fieldset>

<tr>
<td>checkbox-group

<td>
<fieldset>
<legend>pizza toppings</legend>
<input id="freshbasil" type="checkbox"><label for="freshbasil">fresh
basil</label> <input id="freshgarlic" type="checkbox"><label
for="freshgarlic">fresh garlic</label> <input id="freshspinach"
type="checkbox"><label for="freshspinach">fresh spinach</label> <input
id="greenpeppers" type="checkbox"><label for="greenpeppers">green
peppers</label> <input checked id="mushroom" type="checkbox"><label
for="mushroom">mushrooms</label> <input id="olives" type="checkbox"><label
for="olives">olives</label> <input checked id="onions" type="checkbox"><label
for="onions">onions</label> <input id="pineapple" type="checkbox"><label
for="pineapple">pineapple</label> <input checked id="tomatoes"
type="checkbox"><label for="tomatoes">tomatoes</label></fieldset>

<tr>
<td>field

<td><textarea cols="20" rows="3">Note to self.</textarea>

<tr>
<td>password

<td><input type="password" value="secret">
</table>
</div>

<h4 class="no-num no-toc" id="appearance1"><span class="property"><a
href="#appearance0">'appearance'</a></span> property details</h4>

<p> The <span class="property"><a href="#appearance0">'appearance'</a></span>
property is a shorthand for <span class="property"><a
href="#appearance0">'appearance</a></span>', <span
class="property">'color</span>', <span class="property"><a
href="#font">'font</a></span>', and <span class="property"><a
href="#cursor0">'cursor</a></span>'. It sets <span class="property"><a
href="#appearance0">'appearance'</a></span> to the specified value and the
other properties to their appropriate system value; '<span
class="value">normal</span>' resets <span class="property"><a
href="#appearance0">'appearance'</a></span> to '<span
class="value">normal</span>' and the others to '<span
class="value">inherit</span>'. The <span class="property"><a
href="#appearance0">'appearance'</a></span> property does not affect the
specified or computed values of any other properties.

<p> If <span class="property"><a href="#appearance0">'appearance'</a></span>
is not '<span class="value">normal</span>', the UA must render the element as
if it was the specified user interface (UI) control from the platform. The UA
should use the computed values of the <span
class="property">'background-*'</span>, <span
class="property">'border-*'</span>, <span
class="property">'padding-*'</span>, <span
class="property">'outline-*'</span>, and <span
class="property">'text-decoration'</span> properties when they do not have
their initial values and the computed values of <span
class="property">'color'</span>, <span class="property"><a
href="#font">'font'</a></span>, and <span class="property"><a
href="#cursor0">'cursor'</a></span> (whatever their values) to influence the
rendering where possible. Any values from those properties that cannot be
used to influence the rendering of the UI control must not affect the
rendering at all.

<p class="example"> For example, the UA should not draw a second border
around a UI control that already has a border.

<p> If <span class="property">'background-color'</span> or <span
class="property">'background-image'</span> have non-initial values and the UA
is using their values for influencing the rendering of the UI control, then
the UA must ensure that the <span class="property">'color'</span> property is
also used to influence the rendering. <!--
Similarly if <span class="property">'color'</span> is used to influence the rendering, then <span class="property">'background-color'</span> must be used to influence the rendering, and the other <span class="property">'background-*'</span> properties should be used to influence the rendering as well.
-->

<p> Other properties must not affect the handling of <span
class="property"><a href="#appearance0">'appearance'</a></span> and must
instead be applied according to normal CSS rules. In particular <span
class="property">'margin'</span>, <span class="property">'display'</span>,
<span class="property">'float'</span>, <span
class="property">'height'</span>, <span class="property">'width'</span>, and
<span class="property">'line-height'</span>, are not ignored and affect the
element as normal.

<p> This specification does not define the term "platform".

<p class="example"> For example, it could be the native graphical rendering
engine of the operating system, or it could be a user-agent-specific skin. In
addition, which of several toolkits to use could also be decided on an
element-by-element basis depending on the values of the <span
class="property">'background-color'</span>, <span
class="property">'background-image'</span>, <span
class="property">'border-*-style'</span>, and <span class="property"><a
href="#outline-style0">'outline-style'</a></span> properties, so that the
author styles could be honored while still honoring <span class="property"><a
href="#appearance0">'appearance'</a></span> even though the UA is unable to
influence the rendering of OS native UI controls.

<p class="note"><em><strong>Note.</strong> The exact list of properties set
by, influencing, and not affected by <span class="property"><a
href="#appearance0">'appearance'</a></span> given in the lists above may be
adjusted based on UA implementor feedback. </em>

<p>Appearance values take into account the user interface state (if any) of
the element; thus there is no need for separate values for enabled vs.
disabled checkboxes for example.

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="influencing">Influencing the color and
background-color of a button</h4>

<p>This example demonstrates setting the color and background-color of an
element that is set to '<code class="css">appearance:push-button</code>'.</p>

<h5 class="no-num no-toc" id="sample1">sample CSS:</h5>

<pre><code class="css">
input[type=button] {
  appearance:push-button; /* expected from UA defaults */
}

input[type=button].custom { 
  color: #393;
  background-color: #9cf; 
}
</code></pre>

<h5 class="no-num no-toc" id="sample2">sample (X)HTML fragment:</h5>

<pre><code>
&lt;input type="button" value="Plain button" /&gt; 
&lt;input type="button" value="With color" class="custom" /&gt;
</code></pre>

<h5 class="no-num no-toc" id="a-graphical">A graphical browser might render
these buttons as follows:</h5>

<p><object data="plainbutton.png" type="image/png"> First, a rounded button
with black text on a white background, with shades of gray being used near
the edges to give the impression of depth. </object> <object
data="colorbutton.png" type="image/png"> Second, a similar rounded button but
with blue text on a light blue background, and with shades of blue used to
give the impression of depth. </object></p>

<h5 class="no-num no-toc" id="your-browser">Your browser on your system:</h5>

<p><input type="button" value="Plain button"> <input
style="color:#339;background-color:#9cf" type="button" value="With color"></p>
</div>

<h3 id="system0"><span class="secno">5.3. </span>System fonts</h3>

<p>CSS2 introduced system font keywords as values for the shorthand <span
class="property"><a href="#font">'font'</a></span> property which have the
effect of setting all the elemental <span class="property">'font-*'</span>
properties. This specification adds the list of <a
href="#appearance-val">&lt;appearance&gt;</a> values to the set of system
fonts to allow styling text the same as such system controls.

<table class="propdef" id="namefont">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="font">font</dfn>

<tr>
<td><em>System values: </em>

<td> <a href="#appearance-val">&lt;appearance&gt;</a> | status-bar |
message-box | caption | small-caption | inherit

<tr>
<td><em>Initial:</em>

<td>see individual properties in CSS 2.1

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>yes

<tr>
<td><em>Percentages:</em>

<td>N/A for system values

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td> The computed values for system font keywords are simply the keywords
themselves.
</table>

<dl>
<dt><strong title="">icon</strong>

<dd>The font used to label icons.

<dt><strong>window</strong>

<dd>The font used in the content of a window.

<dt><strong>desktop</strong>

<dd>The font used on the desktop.

<dt><strong>workspace</strong>

<dd>The font used in a workspace window.

<dt><strong>document</strong>

<dd>The font used for the content of a document window.

<dt><strong>tooltip</strong>

<dd>The font used in a tooltip window.

<dt><strong>status-bar</strong>

<dd>The font used in window status bars.

<dt><strong>dialog</strong>

<dt><strong>message-box</strong>

<dd>The font used in dialog boxes.

<dt><strong>button</strong>

<dt><strong>caption</strong>

<dd>The font used for buttons (captioned controls etc.).

<dt><strong>small-caption</strong>

<dd>The font used for labeling small controls.

<dt><strong>push-button</strong>

<dd>The specific font used for push-buttons.

<dt><strong>hyperlink</strong>

<dd>The specific font used for hyperlinks.

<dt><strong>radio-button</strong>

<dd>The specific font used for radio-button labels.

<dt><strong>checkbox</strong>

<dd>The font used for checkbox button labels.

<dt><strong>menu-item</strong>

<dd>The font used for menu-item labels.

<dt><strong>tab</strong>

<dd>The font used for tab labels in a tabbed panel interface.

<dt><strong>menu</strong>

<dd>The font used in menus (e.g., dropdown menus and menu lists).

<dt><strong>menubar</strong>

<dd>The specific font used in a menubar.

<dt><strong>pull-down-menu</strong>

<dd>The specific font used in pull-down menus.

<dt><strong>pop-up-menu</strong>

<dd>The specific font used in popup menus.

<dt><strong>list-menu</strong>

<dd>The specific font used in menu lists.

<dt><strong>radio-group</strong>

<dd>The specific font used in radio button groups.

<dt><strong>checkbox-group</strong>

<dd>The specific font used in checkbox button groups.

<dt><strong>outline-tree</strong>

<dd>The specific font used in outline tree views.

<dt><strong>range</strong>

<dd>The specific font used in range controls.

<dt><strong>field</strong>

<dd>The specific font used in form text fields (input or output).

<dt><strong>combo-box</strong>

<dd>The specific font used in a combo-box field.

<dt><strong>signature</strong>

<dd>The specific font used in a signature field.

<dt><strong>password</strong>

<dd>The specific font used in a password field.
</dl>

<h2 id="element"><span class="secno">6. </span>Element icons</h2>

<p>This section is <em>normative</em>.

<h3 id="content0"><span class="secno">6.1. </span><span class="property"><a
href="#content">'content'</a></span> property addition</h3>

<table class="propdef" id="namecontent">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="content">content</dfn>

<tr>
<td><em>New&nbsp;Value(s):</em>

<td title="">icon

<tr>
<td><em>Initial:</em>

<td>same as CSS 2.1

<tr>
<td><em>Applies to:</em>

<td>same as CSS 2.1

<tr>
<td><em>Inherited:</em>

<td>same as CSS 2.1

<tr>
<td><em>Percentages:</em>

<td>same as CSS 2.1

<tr>
<td><em>Media:</em>

<td>same as CSS 2.1

<tr>
<td><em>Computed value:</em>

<td>the keyword '<span class="value" title="">icon</span>' if specified as
such, otherwise same as CSS 2.1
</table>

<dl>
<dt><strong title="">icon</strong>

<dd>The (pseudo-)element is replaced in its entirety by the resource
referenced by its <span class="property"><a href="#icon">'icon'</a></span>
property, and treated as a replaced element.
</dl>

<p class="note"><em><strong>Note.</strong> It is expected that the next draft
of the CSS3 Generated Content module <a href="#CSS3GENCON"
rel="biblioentry">[CSS3GENCON]</a> will include and superset this
functionality. </em>

<h3 id="icon-property"><span class="secno">6.2. </span><span
class="property"><a href="#icon">'icon'</a></span> property</h3>

<table class="propdef" id="nameicon">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="icon">icon</dfn>

<tr>
<td><em>Value:</em>

<td>auto | &lt;uri&gt; [, &lt;uri&gt;]* | inherit

<tr>
<td><em>Initial:</em>

<td>auto

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>all

<tr>
<td><em>Computed value:</em>

<td>The computed value for '<span class="value">auto</span>' is '<span
class="value">auto</span>'. The computed value for the &lt;uri&gt; value is
either the fully qualified URI value for the referenced icon that the UA is
able to render, or '<span class="value">auto</span>' if the UA did not find
any referenced icons that it could render.
</table>

<dl>
<dt><strong>auto</strong>

<dd>Use a default generic icon provided by the user agent.

<dt><strong>&lt;uri&gt;</strong>

<dd>URIs (see <a href="#URI" rel="biblioentry">[URI]</a>, <a href="#RFC1738"
rel="biblioentry">[RFC1738]</a> and <a href="#RFC1808"
rel="biblioentry">[RFC1808]</a>) provide a way of identifying resources. The
&lt;uri&gt; value(s) in this property refer to one or more icons in a comma
delimited list. The user agent loads the referenced icons one by one until it
finds one that it is able to render. This permits the usage of multiple
different icon formats for various platforms, and various media for that
matter.
</dl>

<p>The <span class="property"><a href="#icon">'icon'</a></span> property
provides the author the ability to style any arbitrary element with an iconic
equivalent. An element's icon is not used/rendered unless the <span
class="property"><a href="#content">'content'</a></span> property is set to
the value '<span class="value" title="">icon</span>' (see above). Documents
whose elements have icons assigned to them can be more easily viewed by users
who find too much text distracting.

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="representing">Representing elements with icons</h4>

<p>This example uses the above icon features to display icons in place of
images and objects.</p>

<pre><code class="css">
img,object { content:icon }
  /* note that the CSS3 Generated Content module <a href="#CSS3GENCON" rel="biblioentry">[CSS3GENCON]</a>
     expands the <span class="property"><a href="#content">'content'</a></span> property to apply to all elements. */
     
img { icon:url(imgicon.png); }
  /* provide a custom icon for images */
  
object { icon:url(objicon.png); }
  /* provide a different custom icon for objects */
</code></pre>
</div>

<h2 id="box-model"><span class="secno">7. </span>Box Model addition</h2>

<p>This section is <em>normative</em>.

<h3 id="box-sizing"><span class="secno">7.1. </span><span class="property"><a
href="#box-sizing0">'box-sizing'</a></span> property</h3>

<table class="propdef" id="namebox-sizing">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="box-sizing0">box-sizing</dfn>

<tr>
<td><em>Value:</em>

<td>content-box | border-box | inherit

<tr>
<td><em>Initial:</em>

<td>content-box

<tr>
<td><em>Applies to:</em>

<td>all elements that accept width or height

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td>specified value
</table>

<dl>
<dt><strong>content-box</strong>

<dd>This is the behavior of width and height as specified by CSS2.1. The
specified width and height (and respective min/max properties) apply to the
width and height respectively of the content box of the element. The padding
and border of the element are laid out and drawn outside the specified width
and height.

<dt><strong>border-box</strong>

<dd>The specified width and height (and respective min/max properties) on
this element determine the border box of the element. That is, any padding or
border specified on the element is laid out and drawn inside this specified
width and height. The content width and height are calculated by subtracting
the border and padding widths of the respective sides from the specified
<span class="property">'width'</span> and <span
class="property">'height'</span> properties. As the content width and height
<a href="http://www.w3.org/TR/CSS21/visudet.html#the-width-property">cannot
be negative</a> (<a href="#CSS21" rel="biblioentry">[CSS21]</a>, section
10.2), this computation is floored at 0.
<p class="note"><em><strong>Note.</strong> This is the behavior of width and
height as commonly implemented by legacy HTML user agents for replaced
elements and input elements.</em></p>
</dl>

<div class="example">
<p style="display:none">Example(s):</p>

<h4 class="no-num no-toc" id="using">Using box-sizing to evenly share space</h4>

<p>This example uses box-sizing to evenly horizontally split two divs with
fixed size borders inside a div container, which would otherwise require
additional markup.</p>

<h5 class="no-num no-toc" id="sample3">sample CSS:</h5>

<pre><code class="css">
div.container {
	width:38em;
	border:1em solid black;
}

div.split {
	box-sizing:border-box;
	width:50%;
	border:1em silver ridge;
	float:left;
}
</code></pre>

<h5 class="no-num no-toc" id="sample4">sample (X)HTML fragment:</h5>

<pre><code>
&lt;div class="container"&gt;
&lt;div class="split"&gt;This div occupies the left half.&lt;/div&gt;
&lt;div class="split"&gt;This div occupies the right half.&lt;/div&gt;
&lt;/div&gt;
</code></pre>

<h5 class="no-num no-toc" id="demonstration">demonstration of sample CSS and
(X)HTML:</h5>

<div style="width:38em; border:1em solid black">
<div style="box-sizing:border-box; width:50%; border:1em silver ridge;
float:left">This div should occupy the left half.</div>

<div style="box-sizing:border-box; width:50%; border:1em silver ridge;
float:left">This div should occupy the right half.</div>
The two divs above should appear side by side, each (including borders) 50%
of the content width of their container. If instead they are stacked one on
top of the other then your browser does not support <span class="property"><a
href="#box-sizing0">'box-sizing'</a></span>.</div>
</div>

<h2 id="outline1"><span class="secno">8. </span>Outline properties</h2>

<p>This section is <em>normative</em>.

<p>At times, style sheet authors may want to create outlines around visual
objects such as buttons, active form fields, image maps, etc., to make them
stand out. Outlines differ from borders in the following ways:

<ol>
<li>Outlines do not take up space.

<li>Outlines may be non-rectangular.
</ol>

<p>The outline properties control the style of these dynamic outlines.

<h3 id="outline"><span class="secno">8.1. </span><span class="property"><a
href="#outline0">'outline'</a></span> property</h3>

<table class="propdef" id="propdef-outline">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="outline0">outline</dfn>

<tr>
<td><em>Value:</em>

<td> [ <span class="property">&lt;'outline-color'&gt;</span> || <span
class="property">&lt;'outline-style'&gt;</span> || <span
class="property">&lt;'outline-width'&gt;</span> ] | inherit

<tr>
<td><em>Initial:</em>

<td>see individual properties

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td>undefined for shorthand properties
</table>

<h3 id="outline-width"><span class="secno">8.2. </span><span
class="property"><a href="#outline-width0">'outline-width'</a></span>
property</h3>

<table class="propdef" id="propdef-outline-width">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="outline-width0">outline-width</dfn>

<tr>
<td><em>Value:</em>

<td><a class="noxref"
href="http://www.w3.org/TR/CSS21/box.html#value-def-border-width"><span
class="value-inst-border-width">&lt;border-width&gt;</span></a> | inherit

<tr>
<td><em>Initial:</em>

<td>medium

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td>&lt;length&gt; value in absolute units (px or physical).
</table>

<h3 id="outline-style"><span class="secno">8.3. </span><span
class="property"><a href="#outline-style0">'outline-style'</a></span>
property</h3>

<table class="propdef" id="propdef-outline-style">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="outline-style0">outline-style</dfn>

<tr>
<td><em>Value:</em>

<td>auto | <a class="noxref"
href="http://www.w3.org/TR/CSS21/box.html#value-def-border-style"><span
class="value-inst-border-style">&lt;border-style&gt;</span></a> | inherit

<tr>
<td><em>Initial:</em>

<td>none

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td>specified value
</table>

<h3 id="outline-color"><span class="secno">8.4. </span><span
class="property"><a href="#outline-color0">'outline-color'</a></span>
property</h3>

<table class="propdef" id="propdef-outline-color">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="outline-color0">outline-color</dfn>

<tr>
<td><em>Value:</em>

<td><a class="noxref"
href="http://www.w3.org/TR/css3-color/#colorunits"><span
class="value-inst-color">&lt;color&gt;</span></a> | invert | inherit

<tr>
<td><em>Initial:</em>

<td>invert

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td>The computed value for '<span class="value"><a
href="#invert">invert</a></span>' is '<span class="value"><a
href="#invert">invert</a></span>'. For &lt;color&gt; values, the computed
value is as defined for the <a href="#CSS3COLOR"
rel="biblioentry">[CSS3COLOR]</a> <span class="property">'color'</span>
property.
</table>

<p>The outline created with the outline properties is drawn "over" a box,
i.e., the outline is always on top, and doesn't influence the position or
size of the box, or of any other boxes. Therefore, displaying or suppressing
outlines does not cause reflow.

<p>Outlines may be non-rectangular. For example, if the element is broken
across several lines, the outline should be an outline or minimum set of
outlines that encloses all the element's boxes. Each part of the outline
should be fully connected rather than open on some sides (as borders on
inline elements are when lines are broken). The parts of the outline are not
required to be rectangular. The position of the outline may be affected by
descendant boxes. User agents should use an algorithm for determining the
outline that encloses a region appropriate for conveying the concept of focus
to the user.

<p>The <span class="property"><a
href="#outline-width0">'outline-width'</a></span> property accepts the same
values as <a class="noxref"
href="http://www.w3.org/TR/CSS21/box.html#propdef-border-width"><span
class="propinst-border-width">'border-width'</span></a> (<a href="#CSS21"
rel="biblioentry">[CSS21]</a>, section 8.5.1).

<p>The <span class="property"><a
href="#outline-style0">'outline-style'</a></span> property accepts the same
values as <a class="noxref"
href="http://www.w3.org/TR/CSS21/box.html#propdef-border-style"><span
class="propinst-border-style">'border-style'</span></a> (<a href="#CSS21"
rel="biblioentry">[CSS21]</a>, section 8.5.3), except that '<span
class="value">hidden</span>' is not a legal outline style. In addition, in
CSS3, <span class="property"><a
href="#outline-style0">'outline-style'</a></span> accepts the value '<span
class="value">auto</span>'. The '<span class="value">auto</span>' value
permits the user agent to render a custom outline style, typically a style
which is either a user interface default for the platform, or perhaps a style
that is richer than can be described in detail in CSS, e.g. a rounded edge
outline with semi-translucent outer pixels that appears to glow. As such,
this specification does not define how the <span class="property"><a
href="#outline-color0">'outline-color'</a></span> is incorporated or used (if
at all) when rendering '<span class="value">auto</span>' style outlines. User
agents may treat '<span class="value">auto</span>' as '<span
class="value">solid</span>'.

<p>The <span class="property"><a
href="#outline-color0">'outline-color'</a></span> property accepts all
colors, as well as the keyword '<dfn id="invert">invert</dfn>'. 'Invert' is
expected to perform a color inversion on the pixels on the screen. This is a
common trick to ensure the focus border is visible, regardless of color
background.

<p> Conformant UAs may ignore the '<span class="value"><a
href="#invert">invert</a></span>' value on platforms that do not support
color inversion of the pixels on the screen. If the UA does not support the
'<span class="value"><a href="#invert">invert</a></span>' value then the
initial value of the <span class="property"><a
href="#outline-color0">'outline-color'</a></span> property is the '<span
class="value">currentColor</span>' <a href="#CSS3COLOR"
rel="biblioentry">[CSS3COLOR]</a> keyword.

<p>The <span class="property"><a href="#outline0">'outline'</a></span>
property is a shorthand property, and sets all three of <span
class="property"><a href="#outline-style0">'outline-style'</a></span>, <span
class="property"><a href="#outline-width0">'outline-width'</a></span>, and
<span class="property"><a href="#outline-color0">'outline-color'</a></span>.

<p class="note"><em><strong>Note.</strong> The outline is the same on all
sides. In contrast to borders, there are no 'outline-top' or 'outline-left'
etc. properties.</em>

<p> This specification does not define how multiple overlapping outlines are
drawn, or how outlines are drawn for boxes that are partially obscured behind
other elements.

<div class="example">
<p style="display:none">Example(s):

<p> Here's an example of drawing a thick outline around a BUTTON element:</p>

<pre><code class="css">
button { outline: thick solid }
</code></pre>
</div>

<p>Graphical user interfaces may use outlines around elements to tell the
user which element on the page has the focus. These outlines are in addition
to any borders, and switching outlines on and off should not cause the
document to reflow. The focus is the subject of user interaction in a
document (e.g., for entering text, selecting a button, etc.).

<div class="example">
<p style="display:none">Example(s):</p>

<p>For example, to draw a thick black line around an element when it has the
focus, and a thick red line when it is active, the following rules can be
used:</p>

<pre><code class="css">
:focus  { outline: thick solid black }
:active { outline: thick solid red }
</code></pre>
</div>

<div class="note">
<p> <em><strong>Note.</strong> Since the outline does not affect formatting
(i.e., no space is left for it in the box model), it may well overlap other
elements on the page. </em></p>
</div>

<h3 id="outline-offset"><span class="secno">8.5. </span><span
class="property"><a href="#outline-offset0">'outline-offset'</a></span>
property</h3>

<p>By default, the outline is drawn starting just outside the border edge.
However, it is possible to offset the outline and draw it beyond the border
edge.

<table class="propdef" id="propdef-outline-offset">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="outline-offset0">outline-offset</dfn>

<tr>
<td><em>Value:</em>

<td>&lt;length&gt; | inherit

<tr>
<td><em>Initial:</em>

<td>0

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td>&lt;length&gt; value in absolute units (px or physical).
</table>

<p>If the computed value of <span class="property"><a
href="#outline-offset0">'outline-offset'</a></span> is anything other than 0,
then the outline is outset from the border edge by that amount.

<div class="example">
<p style="display:none">Example(s):</p>

<p>For example, to leave 2 pixels of space between a focus outline and the
element that has the focus, or is active, the following rule can be used:</p>

<pre><code class="css">
:focus,:active  { outline-offset: 2px }
</code></pre>
</div>

<h2 id="resizing"><span class="secno">9. </span>Resizing</h2>

<p>This section is <em>normative</em>.

<p>CSS2.1 provides a mechanism for controlling the appearance of a scrolling
mechanism (e.g. scrollbars), and this specification adds to that a mechanism
for controlling user resizability of elements.

<h3 id="resize"><span class="secno">9.1. </span><span class="property"><a
href="#resize0">'resize'</a></span> property</h3>

<p>The <span class="property"><a href="#resize0">'resize'</a></span> property
allows the author to specify whether or not an element is resizable by the
user, and if so, along which axis/axes.

<table class="propdef" id="propdef-resize">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="resize0">resize</dfn>

<tr>
<td><em>Value: </em>

<td>none | both | horizontal | vertical | inherit

<tr>
<td><em>Initial:</em>

<td>none

<tr>
<td><em>Applies to:</em>

<td>elements with <span class="property">'overflow'</span> other than visible

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual

<tr>
<td><em>Computed value:</em>

<td>specified value.
</table>

<dl>
<dt><strong>none</strong>

<dd>The UA does not present a resizing mechanism on the element, and the user
is given no direct manipulation mechanism to resize the element.

<dt><strong>both</strong>

<dd>The UA presents a bidirectional resizing mechanism to allow the user to
adjust both the height and the width of the element.

<dt><strong>horizontal</strong>

<dd>The UA presents a unidirectional horizontal resizing mechanism to allow
the user to adjust only the width of the element.

<dt><strong>vertical</strong>

<dd>The UA presents a unidirectional vertical resizing mechanism to allow the
user to adjust only the height of the element.
</dl>

<p>Currently it is possible to control the appearance of the scrolling
mechanism (if any) on an element using the <span
class="property">'overflow'</span> property (e.g. '<code
class="css">overflow: scroll</code>' vs. '<code class="css">overflow:
hidden</code>' etc.). The purpose of the <span class="property"><a
href="#resize0">'resize'</a></span> property is to also allow control over
the appearance and function of the resizing mechanism (e.g. a resize box or
widget) on the element.

<p class="note"> <em><strong>Note.</strong> The resizing mechanism is NOT the
same as the scrolling mechanism. The scrolling mechanism allows the user to
determine which portion of the contents of an element is shown. The resizing
mechanism allows the user to determine the size of the element. </em>

<p>The <span class="property"><a href="#resize0">'resize'</a></span> property
applies to elements whose computed <span class="property">'overflow'</span>
value is something other than '<span class="value">visible</span>'. If <span
class="property">'overflow'</span> is different in a particular axis (i.e.
<span class="property">'overflow-x'</span> vs. <span
class="property">'overflow-y'</span>), then this property applies to the
dimension(s) which do not have the value '<span
class="value">visible</span>'.

<p> When an element is resized by the user, the user agent keeps track of a
resize factor (which is initially 1.0) for the width and height, which it
then applies to the computed width and height as part of determining the used
width and height. The element's contents (and surroundings) are reformatted
as necessary.

<p>The resize factor introduces a step in width/height calculations and
formatting as described in <a
href="http://www.w3.org/TR/CSS21/visudet.html">chapter 10 of CSS2.1</a>.
Specifically the following step is inserted between steps 1 and 2 of the
algorithm in <a
href="http://www.w3.org/TR/CSS21/visudet.html#min-max-widths">section
10.4</a> and <a
href="http://www.w3.org/TR/CSS21/visudet.html#min-max-heights">10.7</a> in
CSS2.1 <a href="#CSS21" rel="biblioentry">[CSS21]</a>, where [dimension] is
'width' for 10.4 and 'height' for 10.7.

<blockquote>
<p style="text-indent:-2em"> 1b. If the resize [dimension] factor is not 1.0,
then the tentative used [dimension] is multiplied by that factor, and the
rules above are applied again, but this time using the result of that
multiplication as the computed value for '[dimension]'.
</blockquote>

<p> With regard to interactivity and the Document Object Model (DOM), the
resize factor on an element lasts the lifetime of the element, however, if
the <span class="property"><a href="#resize0">'resize'</a></span> property
itself is altered (e.g. via pseudo-class change or via DOM manipulation),
then the resize factor is reset to 1.0.

<p> The precise direction of resizing (i.e. altering the top left of the
element or altering the bottom right) may depend on a number of factors
including whether the element is absolutely positioned, whether it is
positioned using the <span class="property">'right'</span> and <span
class="property">'bottom'</span> properties, whether the language of the
element is right-to-left etc. The precise direction of resizing is left to
the UA to properly determine for the platform.

<p> The user agent may restrict the resizing range to something suitable,
such as between the original formatted size of the element, and large enough
to encompass all the element's contents.

<div class="example">
<p style="display:none">Example(s):</p>

<p>For example, to make iframes scrollable <em>and</em> resizable, the
following rule can be used:</p>

<pre><code class="css">
iframe,object[type^="text/"],
object[type$="+xml"],object[type="application/xml"] 
{ 
  overflow:auto;
  resize:both;
}
</code></pre>
</div>
<!--
too bad we don't have @viewport yet. otherwise this would be cool:
<pre><code class="css">
@viewport {
       width: 100px; 
       height: 100px;
       overflow: hidden;
       resize: none 
     } /* display content in a non-resizable 100px by 100px window */
</code></pre>
-->

<h2 id="mouse"><span class="secno">10. </span>Mouse and Keyboard</h2>

<p>This section is <em>normative</em>.

<h3 id="cursor"><span class="secno">10.1. </span><span class="property"><a
href="#cursor0">'cursor'</a></span> property</h3>

<table class="propdef" id="propdef-cursor">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="cursor0">cursor</dfn>

<tr>
<td><em>Value:</em>

<td> [ [&lt;uri&gt; [&lt;x&gt; &lt;y&gt;]?,]* <br>
[ auto | default | none |<br>
context-menu | help | pointer | progress | wait | <br>
cell | crosshair | text | vertical-text | <br>
alias | copy | move | no-drop | not-allowed | <br>
e-resize | n-resize | ne-resize | nw-resize | s-resize | se-resize |
sw-resize | w-resize | ew-resize | ns-resize | nesw-resize | nwse-resize |
col-resize | row-resize | all-scroll <br>
] ] | inherit

<tr>
<td><em>Initial:</em>

<td>auto

<tr>
<td><em>Applies to:</em>

<td>all elements

<tr>
<td><em>Inherited:</em>

<td>yes

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>visual, interactive

<tr>
<td><em>Computed value:</em>

<td>If there are one or more &lt;uri&gt; values specified, and the UA finds a
&lt;uri&gt; that it is able to support (due to format, resource availability
etc.), then the computed value is that resolved absolute URI, fully
qualified, with optional &lt;x&gt; and &lt;y&gt; coordinates. If no such
supported &lt;uri&gt; value is found, or if no &lt;uri&gt; values were
specified, then the computed value is the specified keyword value.
</table>

<h4 class="no-num no-toc" id="value">Value descriptions</h4>

<h5 class="no-num no-toc" id="image">image cursors</h5>

<dl>
<dt><strong>&lt;uri&gt;</strong>

<dd>The user agent retrieves the cursor from the resource designated by the
URI. If the user agent cannot handle the first cursor of a list of cursors,
it must attempt to handle the second, etc. If the user agent cannot handle
any user-defined cursor, it must use the cursor keyword at the end of the
list. The optional &lt;x&gt; and &lt;y&gt; coordinates identify the exact
position within the image which is the pointer position (i.e., the hotspot).

<dt><strong>&lt;x&gt;</strong>

<dt><strong>&lt;y&gt;</strong>

<dd> Each is a &lt;number&gt;. The x-coordinate and y-coordinate of the
position in the cursor's coordinate system (left/top relative) which
represents the precise position that is being pointed to. If the values are
unspecified, then the intrinsic hotspot defined inside the image resource
itself is used. If both the values are unspecific and the referenced cursor
has no defined hotspot, the effect is as if a value of "0 0" were specified.
</dl>

<h5 class="no-num no-toc" id="general">general purpose cursors</h5>

<dl>
<dt style="cursor:auto"><strong>auto</strong>

<dd>The UA determines the cursor to display based on the current context.

<dt style="cursor:default"><strong>default</strong>

<dd>The platform-dependent default cursor. Often rendered as an arrow.

<dt style="cursor:none"><strong>none</strong>

<dd>No cursor is rendered for the element.
</dl>

<h5 class="no-num no-toc" id="links">links and status cursors</h5>

<dl>
<dt style="cursor:context-menu"><strong>context-menu</strong>

<dd>A context menu is available for the object under the cursor. Often
rendered as an arrow with a small menu-like graphic next to it.

<dt style="cursor:help"><strong>help</strong>

<dd>Help is available for the object under the cursor. Often rendered as a
question mark or a balloon.

<dt style="cursor:pointer"><strong>pointer</strong>

<dd>The cursor is a pointer that indicates a link.

<dt style="cursor:progress"><strong>progress</strong>

<dd>A progress indicator. The program is performing some processing, but is
different from '<span class="value">wait</span>' in that the user may still
interact with the program. Often rendered as a spinning beach ball, or an
arrow with a watch or hourglass.

<dt style="cursor:wait"><strong>wait</strong>

<dd>Indicates that the program is busy and the user should wait. Often
rendered as a watch or hourglass.
</dl>

<h5 class="no-num no-toc" id="selection">selection cursors</h5>

<dl>
<dt style="cursor:cell"><strong>cell</strong>

<dd>Indicates that a cell or set of cells may be selected. Often rendered as
a thick plus-sign with a dot in the middle.

<dt style="cursor:crosshair"><strong>crosshair</strong>

<dd>A simple crosshair (e.g., short line segments resembling a "+" sign).
Often used to indicate a two dimensional bitmap selection mode.

<dt style="cursor:text"><strong>text</strong>

<dd>Indicates text that may be selected. Often rendered as a vertical I-beam.
User agents may automatically display a horizontal I-beam/cursor (e.g. same
as the '<span class="value">vertical-text</span>' keyword) for vertical text,
or for that matter, any angle of I-beam/cursor for text that is rendered at
any particular angle.

<dt style="cursor:vertical-text"><strong>vertical-text</strong>

<dd>Indicates vertical-text that may be selected. Often rendered as a
horizontal I-beam.
</dl>

<h5 class="no-num no-toc" id="drag-and">drag and drop cursors</h5>

<dl>
<dt style="cursor:alias"><strong>alias</strong>

<dd>Indicates an alias of/shortcut to something is to be created. Often
rendered as an arrow with a small curved arrow next to it.

<dt style="cursor:copy"><strong>copy</strong>

<dd>Indicates something is to be copied. Often rendered as an arrow with a
small plus sign next to it.

<dt style="cursor:move"><strong>move</strong>

<dd>Indicates something is to be moved.

<dt style="cursor:no-drop"><strong>no-drop</strong>

<dd> Indicates that the dragged item cannot be dropped at the current cursor
location. Often rendered as a hand or pointer with a small circle with a line
through it.

<dt style="cursor:not-allowed"><strong>not-allowed</strong>

<dd>Indicates that the requested action will not be carried out. Often
rendered as a circle with a line through it.
</dl>

<h5 class="no-num no-toc" id="resizing0">resizing and scrolling cursors</h5>

<dl>
<dt><strong> <span style="cursor:e-resize">e-resize</span>, <span
style="cursor:n-resize">n-resize</span>, <span
style="cursor:ne-resize">ne-resize</span>, <span
style="cursor:nw-resize">nw-resize</span>, <span
style="cursor:s-resize">s-resize</span>, <span
style="cursor:se-resize">se-resize</span>, <span
style="cursor:sw-resize">sw-resize</span>, <span
style="cursor:w-resize">w-resize</span> </strong>

<dd>Indicates that some edge is to be moved. For example, the 'se-resize'
cursor is used when the movement starts from the south-east corner of the
box.

<dt><strong> <span style="cursor:ew-resize">ew-resize</span>, <span
style="cursor:ns-resize">ns-resize</span>, <span
style="cursor:nesw-resize">nesw-resize</span>, <span
style="cursor:nwse-resize">nwse-resize</span> </strong>

<dd>Indicates a bidirectional resize cursor.

<dt style="cursor:col-resize"><strong>col-resize</strong>

<dd>Indicates that the item/column can be resized horizontally. Often
rendered as arrows pointing left and right with a vertical bar separating
them.

<dt style="cursor:row-resize"><strong>row-resize</strong>

<dd>Indicates that the item/row can be resized vertically. Often rendered as
arrows pointing up and down with a horizontal bar separating them.

<dt style="cursor:all-scroll"><strong>all-scroll</strong>

<dd>Indicates that the something can be scrolled in any direction. Often
rendered as arrows pointing up, down, left, and right with a dot in the
middle.
</dl>

<p>The UA may treat unsupported values as '<span class="value">auto</span>'.
E.g. on platforms that do not have a concept of a '<span
class="value">context-menu</span>' cursor, the UA may render '<span
class="value">default</span>' or whatever is appropriate.

<div class="example">
<h4 class="no-num no-toc" id="example">Example: cursor fallback</h4>

<p>Here is an example of using several cursor values.</p>

<pre><code class="css">
:link,:visited { 
    cursor: url(example.svg#linkcursor), 
            url(hyper.cur),
            url(hyper.png) 2 3, 
            pointer 
}
</code></pre>

<p>This example sets the cursor on all hyperlinks (whether visited or not) to
an external <a
href="http://www.w3.org/TR/SVG/interact.html#CursorElement">SVG cursor</a>
(<a href="#SVG10" rel="biblioentry">[SVG10]</a>, section 16.8.3). User agents
that don't support SVG cursors would simply skip to the next value and
attempt to use the "hyper.cur" cursor. If that cursor format was also not
supported, the UA could attempt to use the "hyper.png" cursor with the
explicit hot spot. Finally if the UA does not support any of those image
cursor formats, the UA would skip to the last value and simply render the
'<span class="value">pointer</span>' cursor.</p>
</div>

<h3 id="keyboard"><span class="secno">10.2. </span>Keyboard control</h3>

<h4 id="nav-index"><span class="secno">10.2.1. </span>Sequential navigation
order: the <span class="property"><a
href="#nav-index0">'nav-index'</a></span> property</h4>

<p>The <span class="property"><a href="#nav-index0">'nav-index'</a></span>
property is an input-method-neutral way of specifying the sequential
navigation order (also known as "tabbing order").

<table class="propdef" id="propdef-nav-index">
<tbody>
<tr>
<td><em>Name:</em>

<td><dfn id="nav-index0">nav-index</dfn>

<tr>
<td><em>Value: </em>

<td>auto | &lt;number&gt; | inherit

<tr>
<td><em>Initial:</em>

<td>auto

<tr>
<td><em>Applies to:</em>

<td>all enabled elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>n/a

<tr>
<td><em>Media:</em>

<td>interactive

<tr>
<td><em>Computed value:</em>

<td>specified value.
</table>

<dl>
<dt>auto

<dd>The element's sequential navigation order is assigned automatically by
the user agent.

<dt>&lt;number&gt;

<dd>The number (which is non-zero and positive) indicates the sequential
navigation order for the element. '<span class="value">1</span>' means first.
Elements with the same nav-index value are navigated in document order when
that nav-index value is being navigated.
</dl>

<p>This property is a replacement for the HTML4/XHTML1 attribute '<a
href="http://www.w3.org/TR/html401/interact/forms.html#h-17.11.1">tabindex</a>'
(<a href="#HTML401" rel="biblioentry">[HTML401]</a>, section 17.11.1).
Borrowed and slightly rephrased from the HTML4 Recommendation:

<p> This property specifies the position of the current element in the
sequential navigation order for the current document.

<p> The sequential navigation order defines the order in which elements will
receive focus when navigated by the user via the keyboard. The sequential
navigation order may include elements nested within other elements.

<p> Elements that may receive focus should be navigated by user agents
according to the following rules:

<ol>
<li>Those elements that support the nav-index property and assign a positive
value to it are navigated first. Navigation proceeds from the element with
the lowest nav-index value to the element with the highest value. Values need
not be sequential nor must they begin with any particular value. Elements
that have identical nav-index values should be navigated in the order they
appear in the character stream.

<li>Those elements that do not support the nav-index property or support it
and assign it a value of '<span class="value">auto</span>' are navigated
next. These elements are navigated in the order they appear in the character
stream.

<li>Elements that are disabled do not participate in the sequential
navigation order.
</ol>

<p> The actual key sequence that causes sequential navigation or element
activation depends on the configuration of the user agent (e.g., the "tab"
key is often used for sequential navigation, and the "enter" key is used to
activate a selected element).

<p> User agents may also define key sequences to navigate the sequential
navigation order in reverse. When the end (or beginning) of the tabbing order
is reached, user agents may circle back to the beginning (or end). The key
combination "shift-tab" is often used for reverse sequential navigation.

<h4 id="nav-dir"><span class="secno">10.2.2. </span>Directional focus
navigation: the <span class="property"><a href="#nav-up">'nav-up'</a></span>,
<span class="property"><a href="#nav-right">'nav-right'</a></span>, <span
class="property"><a href="#nav-down">'nav-down'</a></span>, <span
class="property"><a href="#nav-left">'nav-left'</a></span> properties</h4>

<table class="propdef" id="names">
<tbody>
<tr>
<td><em>Names: </em>

<td><dfn id="nav-up">nav-up</dfn>, <dfn id="nav-right">nav-right</dfn>, <dfn
id="nav-down">nav-down</dfn>, <dfn id="nav-left">nav-left</dfn>

<tr>
<td><em>Value: </em>

<td>auto | &lt;id&gt; [ current | root | &lt;target-name&gt; ]? | inherit

<tr>
<td><em>Initial:</em>

<td>auto

<tr>
<td><em>Applies to:</em>

<td>all enabled elements

<tr>
<td><em>Inherited:</em>

<td>no

<tr>
<td><em>Percentages:</em>

<td>N/A

<tr>
<td><em>Media:</em>

<td>interactive

<tr>
<td><em>Computed value:</em>

<td>&lt;id&gt; as specified with &lt;target-name&gt; string or keyword.
</table>

<dl>
<dt>auto

<dd>The user agent automatically determines which element to navigate the
focus to in response to directional navigational input.

<dt>&lt;id&gt;

<dd>
<p>The &lt;id&gt; value consists of a '<code>#</code>' character followed by
an identifier, similar to a fragment identifier in a URL. It indicates the
element to which the focus is navigated to in response to directional
navigation input respective to the specific property.</p>

<p> If the &lt;id&gt; refers to the currently focused element, the
directional navigation input respective to the nav- property is ignored
&mdash; there is no need to refocus the same element.</p>

<dt>&lt;target-name&gt;

<dd> The &lt;target-name&gt; parameter indicates the target frame for the
focus navigation. It is a string and it cannot start with the underscore "_"
character. If the specified target frame does not exist, the parameter will
be treated as the keyword '<span class="value">current</span>', which means
to simply use the frame that the element is in. The keyword '<span
class="value">root</span>' indicates that the user agent should target the
full window.
</dl>

<p>User agents for devices with directional navigation keys respond by
navigating the focus according to four respective nav-* directional
navigation properties (nav-up, nav-right, nav-down, nav-left). This
specification does not define which keys of a device are directional
navigational keys.

<div class="note">
<p> <em><strong>Note.</strong> Typical personal computers have keyboards with
four arrow keys. One possible implementation would be to use those four arrow
keys for directional navigation. For accessibility and user convenience, user
agents should allow configuration of which keys on a keyboard are used for
directional navigation. </em></p>
</div>

<div class="example">
<h4 class="no-num no-toc" id="example0">Example: positioned buttons</h4>

<p>Here is an example of buttons positioned in a diamond shape whose
navigation order and directional focus navigation is set in such a way to
navigate the focus clockwise (or counter-clockwise) around the diamond shape
when the user chooses to navigate sequentially or directionally.</p>

<pre><code class="css">
button { position:absolute }

button#b1 {
	top:0; left:50%;
	nav-index:1;
	nav-right:#b2; nav-left:#b4;
	nav-down:#b2; nav-up:#b4;
}

button#b2 {
	top:50%; left:100%;
	nav-index:2;
	nav-right:#b3; nav-left:#b1;
	nav-down:#b3; nav-up:#b1;
}

button#b3 {
	top:100%; left:50%;
	nav-index:3;
	nav-right:#b4; nav-left:#b2;
	nav-down:#b4; nav-up:#b2;
}
	
button#b4 {
	top:50%; left:0;
	nav-index:4;
	nav-right:#b1; nav-left:#b3;
	nav-down:#b1; nav-up:#b3;
}
</code></pre>

<p>Whatever markup sequence the buttons may have (which is not specified in
this example) is irrelevant in this case because they are positioned, and
yet, it is still important to ensure focus navigation behaviors which relate
reasonably to the specified layout.</p>
</div>

<hr title="Separator from footer">

<h2 class="no-num" id="acknowledgments">Appendix A. Acknowledgments</h2>

<p>This appendix is <em>informative</em>.

<p>Thanks to feedback and contributions from L. David Baron, Bert Bos,
Matthew Brealey, Ada Chan, Michael Day, Micah Dubinko, Elika E., Steve
Falkenburg, Al Gilman, Ian Hickson, Bjoern Hoehrmann, David Hyatt, Richard
Ishida, Sho Kuwamoto, Susan Lesch, Peter Linss, Brad Pettit, Alexander
Savenkov, Sebastian Schnitzenbaumer, Etan Wexler, David Woolley and Domel.

<h2 class="no-num" id="references">Appendix B. Bibiliography</h2>

<p>This appendix is <em>normative</em>.

<h3 class="no-num no-toc" id="normative">Normative References</h3>
<!--begin-normative-->
<!-- Sorted by label -->

<dl class="bibliography">
<dt style="display: none"><!-- keeps the doc valid if the DL is empty -->
<!---->

<dt id="CSS21">[CSS21]

<dd>Bert Bos; et al. <cite>Cascading Style Sheets, level 2 revision 1.</cite>
25 February 2004. W3C Candidate Recommendation. (Work in progress.) URL: <a
href="http://www.w3.org/TR/2004/CR-CSS21-20040225">http://www.w3.org/TR/2004/CR-CSS21-20040225</a>
<!---->

<dt id="CSS3COLOR">[CSS3COLOR]

<dd>Tantek &#199;elik; Chris Lilley. <cite>CSS3 Color Module.</cite> 14 May
2003. W3C Candidate Recommendation. (Work in progress.) URL: <a
href="http://www.w3.org/TR/2003/CR-css3-color-20030514">http://www.w3.org/TR/2003/CR-css3-color-20030514</a>
<!---->

<dt id="RFC1738">[RFC1738]

<dd>T. Berners-Lee; L. Masinter; M. McCahill. <cite>Uniform Resource Locators
(URL).</cite> December 1994. Internet RFC 1738. URL: <a
href="http://www.ietf.org/rfc/rfc1738.txt">http://www.ietf.org/rfc/rfc1738.txt</a>
<!---->

<dt id="RFC1808">[RFC1808]

<dd>R. Fielding. <cite>Relative Uniform Resource Locators.</cite> June 1995.
Internet RFC 1808. URL: <a
href="http://www.ietf.org/rfc/rfc1808.txt">http://www.ietf.org/rfc/rfc1808.txt</a>
<!---->

<dt id="RFC2119">[RFC2119]

<dd>S. Bradner. <cite>Key words for use in RFCs to Indicate Requirement
Levels.</cite> Internet RFC 2119. URL: <a
href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
<!---->

<dt id="SELECT">[SELECT]

<dd>Daniel Glazman; et al. <cite>Selectors.</cite> 13 November 2001. W3C
Candidate Recommendation. (Work in progress.) URL: <a
href="http://www.w3.org/TR/2001/CR-css3-selectors-20011113">http://www.w3.org/TR/2001/CR-css3-selectors-20011113</a>
<!---->

<dt id="URI">[URI]

<dd>T. Berners-Lee; R. Fielding; L. Masinter. <cite>Uniform Resource
Identifiers (URI): generic syntax.</cite> August 1998. Internet RFC 2396.
URL: <a
href="http://www.isi.edu/in-notes/rfc2396.txt">http://www.isi.edu/in-notes/rfc2396.txt</a>
<!---->
</dl>
<!--end-normative-->

<h3 class="no-num no-toc" id="informative-references">Informative References</h3>
<!--begin-informative-->
<!-- Sorted by label -->

<dl class="bibliography">
<dt style="display: none"><!-- keeps the doc valid if the DL is empty -->
<!---->

<dt id="CSS1">[CSS1]

<dd>H&#229;kon Wium Lie; Bert Bos. <cite>Cascading Style Sheets (CSS1) Level
1 Specification.</cite> 17 December 1996. W3C Recommendation. Revised 11
January 1999. URL: <a
href="http://www.w3.org/TR/1999/REC-CSS1-19990111">http://www.w3.org/TR/1999/REC-CSS1-19990111</a>
<!---->

<dt id="CSS2">[CSS2]

<dd>Bert Bos; et al. <cite>Cascading Style Sheets, level 2 (CSS2)
Specification.</cite> 12 May 1998. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/1998/REC-CSS2-19980512">http://www.w3.org/TR/1998/REC-CSS2-19980512</a>
<!---->

<dt id="CSS3GENCON">[CSS3GENCON]

<dd>Ian Hickson. <cite>CSS3 Generated and Replaced Content Module.</cite> 14
May 2003. W3C Working Draft. (Work in progress.) URL: <a
href="http://www.w3.org/TR/2003/WD-css3-content-20030514">http://www.w3.org/TR/2003/WD-css3-content-20030514</a>
<!---->

<dt id="CSSUI">[CSSUI]

<dd>Tantek &#199;elik. <cite>User Interface for CSS3.</cite> 2 August 2002.
W3C Working Draft. (Work in progress.) URL: <a
href="http://www.w3.org/TR/2002/WD-css3-userint-20020802">http://www.w3.org/TR/2002/WD-css3-userint-20020802</a>
<!---->

<dt id="HTML401">[HTML401]

<dd>David Raggett; Arnaud Le Hors; Ian Jacobs. <cite>HTML 4.01
Specification.</cite> 24 December 1999. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/1999/REC-html401-19991224">http://www.w3.org/TR/1999/REC-html401-19991224</a>
<!---->

<dt id="SVG10">[SVG10]

<dd>Jon Ferraiolo (ed). <cite>Scalable Vector Graphics (SVG) 1.0
Specification.</cite> 4 September 2001. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/2001/REC-SVG-20010904">http://www.w3.org/TR/2001/REC-SVG-20010904</a>
<!---->

<dt id="SVG11">[SVG11]

<dd>Jon Ferraiolo; &#34276;&#27810; &#28147; (FUJISAWA Jun); Dean Jackson
(eds). <cite>Scalable Vector Graphics (SVG) 1.1 Specification.</cite> 14
January 2003. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/2003/REC-SVG11-20030114">http://www.w3.org/TR/2003/REC-SVG11-20030114</a>
<!---->

<dt id="UAAG10">[UAAG10]

<dd>Ian Jacobs; Jon Gunderson; Eric Hansen. <cite>User Agent Accessibility
Guidelines 1.0.</cite> 17 December 2002. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/2002/REC-UAAG10-20021217">http://www.w3.org/TR/2002/REC-UAAG10-20021217</a>
<!---->

<dt id="XFORMS10">[XFORMS10]

<dd>Micah Dubinko; et al. <cite>XForms 1.0.</cite> 14 October 2003. W3C
Recommendation. URL: <a
href="http://www.w3.org/TR/2003/REC-xforms-20031014">http://www.w3.org/TR/2003/REC-xforms-20031014</a>
<!---->

<dt id="XHTML10">[XHTML10]

<dd>Steven Pemberton; et al. <cite>XHTML&#8482; 1.0 The Extensible HyperText
Markup Language (Second Edition).</cite> 26 January 2000. W3C Recommendation.
Revised on 1 August 2002 URL: <a
href="http://www.w3.org/TR/2002/REC-xhtml1-20020801">http://www.w3.org/TR/2002/REC-xhtml1-20020801</a>
<!---->

<dt id="XHTML11">[XHTML11]

<dd>Murray Altheim; Shane McCarron. <cite>XHTML&#8482; 1.1 - Module-based
XHTML.</cite> 31 May 2001. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/2001/REC-xhtml11-20010531">http://www.w3.org/TR/2001/REC-xhtml11-20010531</a>
<!---->

<dt id="XML10">[XML10]

<dd>Tim Bray; et al. <cite>Extensible Markup Language (XML) 1.0 (Third
Edition).</cite> 4 February 2004. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/2004/REC-xml-20040204">http://www.w3.org/TR/2004/REC-xml-20040204</a>
<!---->
</dl>
<!--end-informative-->

<h2 class="no-num" id="changes">Appendix C. Changes</h2>

<p>This appendix is <em>informative</em>.

<p>In general this draft contains numerous editorial/grammatical/spelling
corrections, and several new informative examples. This appendix describes
minor functional changes from the <a
href="http://www.w3.org/TR/2003/WD-css3-ui-20030703">Last Call Working Draft
of 3 July 2003</a> that were made to accommodate <a
href="/Style/css3-updates/css3-ui-comments">last call comments.</a>

<ul>
<li>:active pseudo-class. Clarified that <a href="#active">:active</a> only
applies to the left mouse button on multibutton mice.

<li>:default pseudo-class. Clarified that multiple :default elements are
possible, e.g. multiple default options for a select-many.

<li>:in-range and :out-of-range pseudo-classes. Added sentence: "An element
that lacks data range limits or is not a form control is neither :in-range
nor :out-of-range."

<li><span class="property"><a href="#appearance0">'appearance'</a></span> and
<span class="property"><a href="#font">'font'</a></span> properties. Added
user interface elements '<span class="value">menu-item</span>' and '<span
class="value">tab</span>' in the '<span class="value">button</span>' group,
'<span class="value">range</span>' to '<span class="value">menu</span>'
group, and, '<span class="value">signature</span>', '<span
class="value">password</span>' and '<span class="value">combo-box</span>' to
the '<span class="value">field</span>' group. Better specified <span
class="property"><a href="#appearance0">'appearance'</a></span> property
details.

<li>Icon functionality (and '<span class="value" title="">icon</span>' value)
moved from <span class="property">'display'</span> property to <span
class="property"><a href="#content">'content'</a></span> property.

<li><span class="property">'key-equivalent'</span> property removed.

<li><span class="property"><a href="#cursor0">'cursor'</a></span> property.
Added '<span class="value">none</span>' keyword.

<li><span class="property"><a href="#resize0">'resize'</a></span> property.
Changed media group to 'visual' to match <span
class="property">'overflow'</span>. Removed '<span class="value">auto</span>'
value. Changed initial value to '<span class="value">none</span>' to match
current implementation defaults.

<li><span class="property"><a
href="#outline-style0">'outline-style'</a></span> property. Added '<span
class="value">auto</span>' keyword.

<li>directional navigation properties. Changed &lt;uri&gt; in value
description to &lt;id&gt;. Added target keyword '<span
class="value">current</span>' in addition to '<span
class="value">root</span>'.
</ul>

<h2 class="no-num" id="appendix">Appendix D. Default style sheet additions
for HTML4/XHTML1</h2>

<p>This appendix is <em>informative</em>.

<p>Potential additions to the base style sheet to express HTML4/XHTML1 form
controls and a few HTML4/XHTML1 dynamic presentation attributes:

<pre class="html4ss">

:link,:visited { 
 appearance: hyperlink; /* set color, font, background, padding, border, etc.*/
}

:enabled:focus {
 outline: 2px inset;
}

button,
input[type=button],
input[type=reset],
input[type=submit],
input[type=checkbox],
input[type=radio],
textarea,
input,
input[type=text],
input[type=hidden],
input[type=password],
input[type=image]
{
 appearance: button;
 display: inline-block;
 white-space: nowrap;
}

button,
input[type=button],
input[type=reset][value],
input[type=submit][value]
{
/* appearance of HTML4/XHTML1 push buttons */
 appearance: push-button;
}

button
{
/* white space handling of BUTTON tags in particular */
 white-space:normal;
}

input[type=reset]
{
/* default content of HTML4/XHTML1 input type=reset button */
 content: "Reset";
}

input[type=submit]
{
/* default content of HTML4/XHTML1 input type=submit button */
 content: "Submit";
}

input[type=button],
input[type=reset][value],
input[type=submit][value]
{
/* text content/labels of HTML4/XHTML1 "input" buttons */
 content: attr(value);
}

input[type=checkbox]
{
 appearance:checkbox;
}

input[type=radio]
{
 appearance:radio-button;
}

textarea,
input,
input[type=text],
input[type=hidden],
input[type=password]
{
 appearance: field;
}

textarea
{
/* white space handling of TEXTAREA tags in particular */
 white-space:pre-wrap;
}

input[type=password]
{
 appearance: password;
}

input[type=hidden] 
{
/* appearance of the HTML4/XHTML1 hidden text field in particular */
 display: none;
}

input[type=image]
{
 display: inline-block;
 content: attr(src,url);
 border: none;
}

select[size]
{
/* HTML4/XHTML1 &lt;select&gt; w/ size more than 1 - appearance of list */
 appearance: list-menu;
 display: inline-block;
 height: attr(size,em);
}

select,select[size=1]
{
/* HTML4/XHTML1 &lt;select&gt; without size, or size=1 - popup-menu */
 appearance: popup-menu;
 display: inline-block;
 height: 1em;
 overflow: hidden;
}

option
{
 appearance:menu-item;
}

select[size]:active
{
/* active HTML4/XHTML &lt;select&gt; w/ size more than 1 - appearance of active list */
 display: inline-block;
}

optgroup,option
{
 display: block;
 white-space: nowrap;
}

optgroup[label],option[label] 
{
 content: attr(label);
}

option[selected]::before 
{ 
 display: inline;
 content: check; 
}

*[tabindex] { nav-index:attr(tabindex,number) }


/* Though FRAME resizing is not directly addressed by this specification,
   the following rules may provide an approximation of reasonable behavior. */

/*

frame { resize:both }
frame[noresize] { resize:none }

*/

</pre>

<h2 class="no-num" id="appendix0">Appendix E. Example profiles</h2>

<p>This appendix is <em>informative</em>.

<p>These example profiles are written to roughly reflect the set of
functionality that other specifications use/define which has been explicitly
defined and/or updated in this specification. These profiles are independent
of any other dimensions of variability, e.g. properties that may allow some
values to be treated as other values.

<p> This specification recommends that implementations base their support on
at least one of the profiles defined below. Thus a CSS2.1 user agent for
example, should consider supporting the CSS2.1 profile for CSS3 Basic UI.

<h3 class="no-num no-toc" id="css1-profile">CSS1 profile for CSS3 Basic UI</h3>

<table border="1" class="tprofile" width="75%">
<tbody>
<tr>
<th class="title" colspan="2"><span class="modulename">CSS3 Basic User
Interface</span> profile

<tr>
<th>Specification

<td>CSS level 1

<tr>
<th>Accepts

<td> :active pseudo-class on hyperlinks

<tr>
<th>Excludes

<td> :hover, :active on non-hyperlinks, :focus, :enabled, :disabled,
:checked, :indeterminate pseudo-classes<br>
:default, :valid, :invalid, :in-range, :out-of-range, :required, :optional,
:read-only, :read-write pseudo-classes<br>
::selection, ::value, ::choices, ::repeat-item, ::repeat-index
pseudo-elements<br>
'appearance' property<br>
'font' property keyword additions<br>
'icon' keyword value for 'content' property<br>
'box-sizing' property<br>
'outline', 'outline-width', 'outline-style', 'outline-color',
'outline-offset' properties<br>
'resize' property<br>
'cursor' property<br>
'nav-index', 'nav-up', 'nav-right', 'nav-down', 'nav-left' properties

<tr>
<th>Extra constraints

<td>none.
</table>

<h3 class="no-num no-toc" id="css2.1">CSS2.1 profile for CSS3 Basic UI</h3>

<table border="1" class="tprofile" width="75%">
<tbody>
<tr>
<th class="title" colspan="2"><span class="modulename">CSS3 Basic User
Interface</span> profile

<tr>
<th>Specification

<td>CSS level 2 revision 1

<tr>
<th>Accepts

<td> :hover, :active, :focus pseudo-classes<br>
'font' property keyword values: 'caption', 'icon', 'menu', 'message-box',
'small-caption', 'status-bar'.<br>
'outline', 'outline-width', 'outline-style', 'outline-color' properties.<br>
'cursor' property<br>

<tr>
<th>Excludes

<td> :enabled, :disabled, :checked, :indeterminate pseudo-classes<br>
:default, :valid, :invalid, :in-range, :out-of-range, :required, :optional,
:read-only, :read-write pseudo-classes<br>
::selection, ::value, ::choices, ::repeat-item, ::repeat-index
pseudo-elements<br>
'appearance' property<br>
'font' property keyword additions<br>
'icon' keyword value for 'content' property<br>
'box-sizing' property<br>
'outline-offset' property<br>
'resize' property<br>
'cursor' property additions<br>
'nav-index', 'nav-up', 'nav-right', 'nav-down', 'nav-left' properties

<tr>
<th>Extra constraints

<td>'cursor' property support omits hotspot for downloaded cursors, and new
cursor keyword values. 'outline-style' property does not support 'auto'
value.
</table>

<h3 class="no-num no-toc" id="xforms">XForms profile for CSS3 Basic UI</h3>

<table border="1" class="tprofile" width="75%">
<tbody>
<tr>
<th class="title" colspan="2"><span class="modulename">CSS3 Basic User
Interface</span> profile

<tr>
<th>Specification

<td>XForms 1.0

<tr>
<th>Accepts

<td> :hover, :active, :focus, :enabled, :disabled, :checked, :indeterminate
pseudo-classes<br>
:default, :valid, :invalid, :in-range, :out-of-range, :required, :optional,
:read-only, :read-write pseudo-classes<br>
::value, ::choices, ::repeat-item, ::repeat-index pseudo-elements

<tr>
<th>Excludes

<td> ::selection pseudo-element<br>
'appearance' property<br>
'outline', 'outline-width', 'outline-style', 'outline-color' properties.<br>
'cursor' property<br>
'font' property keyword additions<br>
'icon' keyword value for 'content' property<br>
'box-sizing' property<br>
'outline-offset' property<br>
'resize' property<br>
'cursor' property additions<br>
'nav-index', 'nav-up', 'nav-right', 'nav-down', 'nav-left' properties

<tr>
<th>Extra constraints

<td>none.
</table>

<h3 class="no-num no-toc" id="full-profile">Full profile for CSS3 Basic UI</h3>

<table border="1" class="tprofile" width="75%">
<tbody>
<tr>
<th class="title" colspan="2"><span class="modulename">CSS3 Basic User
Interface</span> profile

<tr>
<th>Specification

<td>CSS3

<tr>
<th>Accepts

<td> :hover, :active, :focus, :enabled, :disabled, :checked, :indeterminate
pseudo-classes<br>
:default, :valid, :invalid, :in-range, :out-of-range, :required, :optional,
:read-only, :read-write pseudo-classes<br>
::selection, ::value, ::choices, ::repeat-item, ::repeat-index
pseudo-elements<br>
'appearance' property<br>
'outline', 'outline-width', 'outline-style', 'outline-color' properties.<br>
'cursor' property<br>
'font' property keyword additions<br>
'icon' keyword value for 'content' property<br>
'box-sizing' property<br>
'outline-offset' property<br>
'resize' property<br>
'cursor' property additions<br>
'nav-index', 'nav-up', 'nav-right', 'nav-down', 'nav-left' properties

<tr>
<th>Excludes

<td> none.

<tr>
<th>Extra constraints

<td>none.
</table>

<h2 class="no-num" id="appendix1">Appendix F: Test Suite</h2>

<p>This appendix is <em>informative</em>.

<p> This specification shall refer to a test suite written according to the
<a href="http://www.w3.org/Style/CSS/Test/testsuitedocumentation">CSS Test
Suite Documentation</a> and following the <a
href="http://www.w3.org/Style/CSS/Test/guidelines.html">CSS2.1 Test Case
Authoring Guidelines</a>. The test suite shall allow user agents to verify
their basic conformance to the specification. This test suite does not
pretend to be exhaustive and does not cover all possible combinations of user
interface related features. These tests will be made available from the <a
href="http://www.w3.org/Style/CSS/Test/">CSS Test Suites</a> home page.

<h2 class="no-num" id="index">Index</h2>

<p>This appendix is <em>informative</em>.
<!--begin-index-->

<ul class="indexlist">
<li>appearance, <a href="#appearance0"><strong>#</strong></a>

<li>box-sizing, <a href="#box-sizing0"><strong>#</strong></a>

<li>content, <a href="#content"><strong>#</strong></a>

<li>cursor, <a href="#cursor0"><strong>#</strong></a>

<li>font, <a href="#font"><strong>#</strong></a>

<li>icon, <a href="#icon"><strong>#</strong></a>

<li>invert, <a href="#invert"><strong>#</strong></a>

<li>&lt;appearance&gt;, <a href="#ltappearancegt"><strong>#</strong></a>

<li>MAY, <a href="#may"><strong>#</strong></a>

<li>MUST, <a href="#must"><strong>#</strong></a>

<li>MUST NOT, <a href="#must-not"><strong>#</strong></a>

<li>nav-down, <a href="#nav-down"><strong>#</strong></a>

<li>nav-index, <a href="#nav-index0"><strong>#</strong></a>

<li>nav-left, <a href="#nav-left"><strong>#</strong></a>

<li>nav-right, <a href="#nav-right"><strong>#</strong></a>

<li>nav-up, <a href="#nav-up"><strong>#</strong></a>

<li>OPTIONAL, <a href="#optional"><strong>#</strong></a>

<li>outline, <a href="#outline0"><strong>#</strong></a>

<li>outline-color, <a href="#outline-color0"><strong>#</strong></a>

<li>outline-offset, <a href="#outline-offset0"><strong>#</strong></a>

<li>outline-style, <a href="#outline-style0"><strong>#</strong></a>

<li>outline-width, <a href="#outline-width0"><strong>#</strong></a>

<li>RECOMMENDED, <a href="#recommended"><strong>#</strong></a>

<li>REQUIRED, <a href="#required"><strong>#</strong></a>

<li>resize, <a href="#resize0"><strong>#</strong></a>

<li>SHALL, <a href="#shall"><strong>#</strong></a>

<li>SHALL NOT, <a href="#shall0"><strong>#</strong></a>

<li>SHOULD, <a href="#should"><strong>#</strong></a>

<li>SHOULD NOT, <a href="#should0"><strong>#</strong></a>
</ul>
<!--end-index-->

<h2 class="no-num" id="property">Property index</h2>

<p>This appendix is <em>informative</em>.
<!--begin properties-->

<table class="proptable">
<thead>
<tr>
<th>Property

<th>Values

<th>Initial

<th>Applies&nbsp;to

<th>Inh.

<th>Percentages

<th>Media

<tbody>
<tr valign="baseline">
<td><span class="property"><a href="#appearance0">appearance</a></span>

<td>normal | &lt;appearance&gt; | inherit

<td>normal

<td>all elements

<td>no

<td>N/A

<td>visual, interactive

<tr valign="baseline">
<td><span class="property"><a href="#box-sizing0">box-sizing</a></span>

<td>content-box | border-box | inherit

<td>content-box

<td>all elements that accept width or height

<td>no

<td>N/A

<td>visual

<tr valign="baseline">
<td><span class="property"><a href="#content">content</a></span>

<td>icon

<td>same as CSS 2.1

<td>same as CSS 2.1

<td>same as CSS 2.1

<td>same as CSS 2.1

<td>same as CSS 2.1

<tr valign="baseline">
<td><span class="property"><a href="#cursor0">cursor</a></span>

<td>[ [&lt;uri&gt; [&lt;x&gt; &lt;y&gt;]?,]* [ auto | default | none |
context-menu | help | pointer | progress | wait | cell | crosshair | text |
vertical-text | alias | copy | move | no-drop | not-allowed | e-resize |
n-resize | ne-resize | nw-resize | s-resize | se-resize | sw-resize |
w-resize | ew-resize | ns-resize | nesw-resize | nwse-resize | col-resize |
row-resize | all-scroll ] ] | inherit

<td>auto

<td>all elements

<td>yes

<td>N/A

<td>visual, interactive

<tr valign="baseline">
<td><span class="property"><a href="#font">font</a></span>

<td>&lt;appearance&gt; | status-bar | message-box | caption | small-caption |
inherit

<td>see individual properties in CSS 2.1

<td>all elements

<td>yes

<td>N/A for system values

<td>visual

<tr valign="baseline">
<td><span class="property"><a href="#icon">icon</a></span>

<td>auto | &lt;uri&gt; [, &lt;uri&gt;]* | inherit

<td>auto

<td>all elements

<td>no

<td>N/A

<td>all

<tr valign="baseline">
<td><span class="property"><a href="#nav-index0">nav-index</a></span>

<td>auto | &lt;number&gt; | inherit

<td>auto

<td>all enabled elements

<td>no

<td>n/a

<td>interactive

<tr valign="baseline">
<td><span class="property"><a href="#nav-up">nav-up</a></span>, <span
class="property"><a href="#nav-right">nav-right</a></span>, <span
class="property"><a href="#nav-down">nav-down</a></span>, <span
class="property"><a href="#nav-left">nav-left</a></span>

<td>auto | &lt;id&gt; [ current | root | &lt;target-name&gt; ]? | inherit

<td>auto

<td>all enabled elements

<td>no

<td>N/A

<td>interactive

<tr valign="baseline">
<td><span class="property"><a href="#outline0">outline</a></span>

<td>[ &lt;'outline-color'&gt; || &lt;'outline-style'&gt; ||
&lt;'outline-width'&gt; ] | inherit

<td>see individual properties

<td>all elements

<td>no

<td>N/A

<td>visual

<tr valign="baseline">
<td><span class="property"><a href="#outline-color0">outline-color</a></span>

<td>&lt;color&gt; | invert | inherit

<td>invert

<td>all elements

<td>no

<td>N/A

<td>visual

<tr valign="baseline">
<td><span class="property"><a
href="#outline-offset0">outline-offset</a></span>

<td>&lt;length&gt; | inherit

<td>0

<td>all elements

<td>no

<td>N/A

<td>visual

<tr valign="baseline">
<td><span class="property"><a href="#outline-style0">outline-style</a></span>

<td>auto | &lt;border-style&gt; | inherit

<td>none

<td>all elements

<td>no

<td>N/A

<td>visual

<tr valign="baseline">
<td><span class="property"><a href="#outline-width0">outline-width</a></span>

<td>&lt;border-width&gt; | inherit

<td>medium

<td>all elements

<td>no

<td>N/A

<td>visual

<tr valign="baseline">
<td><span class="property"><a href="#resize0">resize</a></span>

<td>none | both | horizontal | vertical | inherit

<td>none

<td>elements with 'overflow' other than visible

<td>no

<td>N/A

<td>visual
</table>
<!--end properties-->
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-declaration:"~/SGML/HTML4.decl"
sgml-default-doctype-name:"html"
sgml-minimize-attributes:t
sgml-nofill-elements:("pre" "style" "br")
sgml-live-element-indicator:t
End:
-->