21-mirroring-policy.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<h1 class="title">Mirroring the W3C Site</h1>
<ul class="w3c_toc"><li class="toc_prefix">On this page → </li><li><a href="#new">mirroring</a><span class="bullet"> • </span></li><li><a href="#caching">caching</a></li></ul>
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<p class="intro tPadding">In order to promote efficient access to W3C content the W3C Webmaster Team has deployed
mirrors on several continents: North America, Asia, Europe.</p>
<h2 id="new">Mirroring</h2>
<p><em>This document is out-of-date and needs review by W3C.</em></p>
<p>Presently all mirrors are under the control of the W3C.
W3C is currently not granting permission to other parties to run mirrors
of W3C sites. You are welcome to maintain copies of W3C resources as outlined in our <a href="/Consortium/Legal/2002/copyright-documents-20021231.html">W3C Document License</a>.</p>
<p>Some of the challenges to mirroring include:</p>
<ul class="show_items"><li>Mirroring the W3C Site with tools such as <i>wget</i> is inadequate: documents are
constantly changing and that would mean that the mirror would constantly be out-of-date.</li><li>Changes on the site should appear on all the mirrors at the same time.</li><li>The W3C must ensure that content is up to date and served in accordance with W3C
trademark, copyright, privacy, and administrative policies. Furthermore, the W3C will
clearly define the responsibilities and liabilities associated with those policies -- and
their abuse. As an example, sites that don't abide by our privacy policies may be subject
to civil or even criminal prosecution in some jurisdictions.</li></ul>
<h2 id="caching">Caching of W3C materials</h2>
<p>Caching of W3C materials should comply with the "maximum time to live"
information provided with the materials. After such materials have expired they should not
be served from shared caches without first validating the contents of the W3C Site. For more on HTTP caching, see <a href="http://www.ietf.org/rfc/rfc2616.txt">RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1</a>.</p>
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