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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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<li class="current">Efficient XML Interchange Current Status</li>
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<h1 class="title">Efficient XML Interchange Current Status</h1>
<ul class="w3c_toc">
<li>
<a href="#completed">completed work</a>
— including <a href="#stds">standards</a>
<span class="bullet">• </span>
</li>
<li>
<a href="#drafts">drafts</a>
</li>
</ul>
<div id="w3c_content_body">
<div id="w3c_generated_status">
<p id="w3c_toggle_include" class="default_open intro tPadding">This page summarizes the relationships among specifications, whether they are finished standards or drafts. Below, each title
links to the most recent version of a document.
For related introductory information, see: <a href="http://www.w3.org/standards/xml/core">XML Essentials</a>.</p>
<h2 id="completed">Completed Work</h2>
<p>
<a href="/TR/tr-technology-stds">W3C Recommendations</a> have
been reviewed by W3C Members, by software developers, and by other
W3C groups and interested parties, and are endorsed by the
Director as Web Standards. Learn more about the <a href="/Consortium/Process/tr#rec-advance">W3C Recommendation
Track</a>.</p>
<p>
<a href="/2005/10/Process-20051014/tr.html#q75">Group Notes</a> are <em>not</em> standards and do not
have the same level of W3C endorsement.</p>
<h3 id="stds">Standards</h3>
<div class="data lMargin rMargin">
<table class="w3c_spec_summary_table">
<tbody>
<tr class="lastRow">
<td class="table_datecol">
<a href="../history/exi" title="Efficient XML Interchange (EXI) Format 1.0 publication history">2011-03-10</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is REC" href="http://www.w3.org/TR/2011/REC-exi-20110310/">Efficient XML Interchange (EXI) Format 1.0</a>
</h4>
<p class="rec_support_data">
<a href="http://www.w3.org/TR/2011/REC-exi-20110310/,translations">translations</a>
·
<a href="http://www.w3.org/XML/EXI/exi-10-errata">errata</a>
</p>
<div class="expand_description">
<p>The specification of the EXI format, a compact representation of an
XML document that saves space and bandwidth, and optimizes
processing speed.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<h3 id="notes">Group Notes</h3>
<div class="data lMargin rMargin">
<table class="w3c_spec_summary_table">
<tbody>
<tr>
<td class="table_datecol">
<a href="../history/xbc-characterization" title="XML Binary Characterization publication history">2005-03-31</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is NOTE" href="http://www.w3.org/TR/2005/NOTE-xbc-characterization-20050331/">XML Binary Characterization</a>
</h4>
<div class="expand_description">
<p>This document presents the final conclusions of the XBC study.</p>
</div>
</td>
</tr>
<tr>
<td>
<a href="../history/xbc-measurement" title="XML Binary Characterization Measurement Methodologies publication history">2005-03-31</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is NOTE" href="http://www.w3.org/TR/2005/NOTE-xbc-measurement-20050331/">XML Binary Characterization Measurement Methodologies</a>
</h4>
<div class="expand_description">
<p>Measurement methodologies for the XBC Properties : methods, caveats,
test scenarios.</p>
</div>
</td>
</tr>
<tr>
<td>
<a href="../history/xbc-properties" title="XML Binary Characterization Properties publication history">2005-03-31</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is NOTE" href="http://www.w3.org/TR/2005/NOTE-xbc-properties-20050331/">XML Binary Characterization Properties</a>
</h4>
<div class="expand_description">
<p>The list of the properties of a binary encoding of XML that would be
used in the XBC use cases.</p>
</div>
</td>
</tr>
<tr class="lastRow">
<td>
<a href="../history/xbc-use-cases" title="XML Binary Characterization Use Cases publication history">2005-03-31</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is NOTE" href="http://www.w3.org/TR/2005/NOTE-xbc-use-cases-20050331/">XML Binary Characterization Use Cases</a>
</h4>
<div class="expand_description">
<p>The start of the XBC work : describing the broad range of use cases
for a binary encoding of XML information.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<h2 id="drafts">Drafts</h2>
<p>Below are draft documents:
<a href="/2005/10/Process-20051014/tr.html#RecsWD">other Working Drafts</a>.
Some of these may become Web Standards through the <a href="/Consortium/Process/tr#rec-advance">W3C Recommendation Track
process</a>. Others may be published as Group Notes or
become obsolete specifications.</p>
<h3 id="wd">Other Working Drafts</h3>
<div class="data lMargin rMargin">
<table class="w3c_spec_summary_table">
<tbody>
<tr>
<td class="table_datecol">
<a href="../history/exi-profile" title="Efficient XML Interchange (EXI) Profile publication history">2011-08-16</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is WD" href="http://www.w3.org/TR/2011/WD-exi-profile-20110816/">Efficient XML Interchange (EXI) Profile</a>
</h4>
<div class="expand_description">
<p>This profile of the EXI 1.0 specification allows restrictions on the memory
consumption of EXI internal structures. It is intended for application areas
and devices that are not capable or allowed to require arbitrary memory
growth at runtime. Certain evaluations of EXI in the context of such areas
exposed some challenges to the attempt to restrict memory usage predictably
within their limited respective threshold.
</p>
</div>
</td>
</tr>
<tr>
<td>
<a href="../history/exi-primer" title="Efficient XML Interchange (EXI) Primer publication history">2009-12-08</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is WD" href="http://www.w3.org/TR/2009/WD-exi-primer-20091208/">Efficient XML Interchange (EXI) Primer</a>
</h4>
<div class="expand_description">
<p>This is a non-normative document intended to provide an easily
readable technical background on the Efficient XML Interchange
(EXI) format. It is oriented towards quickly understanding how the
EXI format can be used in practice and how options can be set to
achieve specific needs. Section 2.
Concepts describes the structure of an EXI document and
introduces the notions of EXI header, EXI body and EXI grammar
which are fundamental to the understanding of the EXI format.
Additional details about data type representation, compression, and
their interaction with other format features are presented.
Finally, Section 3. Efficient XML
Interchange by Example provides a detailed, bit-level
description of a schema-less example.</p>
</div>
</td>
</tr>
<tr>
<td>
<a href="../history/exi-evaluation" title="Efficient XML Interchange Evaluation publication history">2009-04-07</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is WD" href="http://www.w3.org/TR/2009/WD-exi-evaluation-20090407">Efficient XML Interchange Evaluation</a>
</h4>
<div class="expand_description">
<p>This Working Draft is an evaluation of the Efficient XML Interchange
(EXI) Format 1.0 with reference to the Properties identified by the
XML Binary Characterization (XBC)
Working Group, relative to XML, gzipped XML and ASN.1 PER. It is
conducted using the XBC
Measurement methodology. For the "compactness" and
"processing
efficiency" Properties, the performance is measured with EXI
Measurement framework, over the test data
collected for the EXI measurements, representing XBC Use Cases. </p>
</div>
</td>
</tr>
<tr>
<td>
<a href="../history/exi-impacts" title="Efficient XML Interchange (EXI) Impacts publication history">2008-09-03</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is WD" href="http://www.w3.org/TR/2008/WD-exi-impacts-20080903">Efficient XML Interchange (EXI) Impacts</a>
</h4>
<div class="expand_description">
<p>The Efficient XML Interchange (EXI) format defines a new
representation for the Extensible Markup Language (XML) Information
Set. The introduction of such a format may cause disruption in
systems that have so far been able to assume XML as the only
representation of XML Information Set data. This document reviews
areas where the introduction of EXI may disrupt or otherwise have
an impact on existing XML technologies, XML processors, and
applications. It also describes EXI design features and steps that
may be taken by implementors to reduce or eliminate disruption and
impacts.</p>
</div>
</td>
</tr>
<tr>
<td>
<a href="../history/exi-best-practices" title="Efficient XML Interchange (EXI) Best Practices publication history">2007-12-19</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is WD" href="http://www.w3.org/TR/2007/WD-exi-best-practices-20071219/">Efficient XML Interchange (EXI) Best Practices</a>
</h4>
<div class="expand_description">
<p>The purpose of this document is to provide guidelines for the
interoperable deployment of the Efficient XML Interchange (EXI)
format. It provides explanations of format features and techniques
to support interoperable information exchanges using EXI. While
intended primarily as a practical guide for systems architects and
programmers, it also presents information suitable for the general
reader interested in EXI's intended role in the expanding Web.</p>
</div>
</td>
</tr>
<tr class="lastRow">
<td>
<a href="../history/exi-measurements" title="Efficient XML Interchange Measurements Note publication history">2007-07-25</a>
</td>
<td>
<h4 class="w3c_status_title">
<a title="status is WD" href="http://www.w3.org/TR/2007/WD-exi-measurements-20070725/">Efficient XML Interchange Measurements Note</a>
</h4>
<div class="expand_description">
<p>This Working Group Note presents measurement results of various
high-performance XML interchange encoding formats and their associated
processors, made by the Efficient XML Interchange (EXI) Working Group. The
measurements have been conducted following the recommendations of the XML Binary Characterization (XBC)
Working Group. In particular, this draft covers measurements of the
properties of "compactness", "processing
efficiency" and "roundtrip
support", as defined by the XBC WG. We start by describing the context in
which this analysis is being made, and the position of an efficient format in
the landscape of high performance XML strategies. Then we describe the
measured quantities in detail and the test framework in which they were made,
and give a short description of each format. Finally, a summary of the
results and the conclusions of the group are included. The
full measurements and analysis are included in an appendix and supporting
documents.</p>
<p>As a result of the measurements described here, the working group selected
Efficient XML ([EffXML]) to be the
basis for the proposed encoding specification to be
prepared as a candidate W3C Recommendation. Follow up work has centered
around integrating some features from the other measured format technologies,
particularly variations for both more efficient structural and value
encodings. </p>
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