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EXI 成為 W3C 推薦標準！<br>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject: </th>
<td>Efficient XML Interchange (EXI) Format 1.0 is a W3C
Recommendation</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Resent-Date:
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<td>Thu, 10 Mar 2011 18:11:18 +0000</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Resent-From:
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<td><a class="moz-txt-link-abbreviated" href="mailto:w3c-ac-members@w3.org">w3c-ac-members@w3.org</a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Thu, 10 Mar 2011 12:11:15 -0600</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Ian Jacobs <a class="moz-txt-link-rfc2396E" href="mailto:ij@w3.org"><ij@w3.org></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td>W3C Members <a class="moz-txt-link-rfc2396E" href="mailto:w3c-ac-forum@w3.org"><w3c-ac-forum@w3.org></a></td>
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<pre>Dear Advisory Committee Representative,
I am pleased to announce that Efficient XML Interchange (EXI) Format
1.0 has been published as a W3C Recommendation:
Efficient XML Interchange (EXI) Format 1.0
<a class="moz-txt-link-freetext" href="http://www.w3.org/TR/2011/REC-exi-20110310/">http://www.w3.org/TR/2011/REC-exi-20110310/</a>
The Efficient XML Interchange Format (EXI) is an XML-aware compression
format. It can take advantage of XML Schema information, and, unlike
generic compression systems such as gzip, starts out with knowledge of
XML. EXI is already seeing adoption in communications between small
devices, and is also being used for large datasets in the sciences, as
well as for general XML and Web usage. Most applications do not need
to be changed in order o benefit from EXI.
All Members except one who responded to the Call for Review [1] of the
document supported the publication as-is of this specification as a
W3C Recommendation. There was one request for editorial changes to the
references, which were accepted where possible.
In addition, the EXI test suite has been made public from the Working
Group page [2].
Please join us in congratulating the Efficient XML Interchange Working
Group [2] for their achievement.
For Tim Berners-Lee, Director;
Ian Jacobs, Head of W3C Communications.
[1] <a class="moz-txt-link-freetext" href="http://www.w3.org/2002/09/wbs/33280/exipr2011/results">http://www.w3.org/2002/09/wbs/33280/exipr2011/results</a>
[2] <a class="moz-txt-link-freetext" href="http://www.w3.org/XML/EXI/">http://www.w3.org/XML/EXI/</a>
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Disposition of Comments
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One reviewer requested an update to references to ISO 10646, XML
Names, Relax NG ISO/IEF 1957-2:2008 and SOAP. Of these, ISO 10646 was
not yet final at the time of publication of this Recommendation, but
the other changes
were checked and did not affect the format, and so were accepted.
The same commenter also asked about the Primer; work on this document
and on a public FAQ are active and ongoing.
Overall, the W3C Advisory Committee showed strong support for this
specification to be published as a W3C Recommendation.
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Abstract
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This document is the specification of the Efficient XML Interchange
(EXI) format. EXI is a very compact representation for the Extensible
Markup Language (XML) Information Set that is intended to
simultaneously optimize performance and the utilization of
computational resources. The EXI format uses a hybrid approach drawn
from the information and formal language theories, plus practical
techniques verified by measurements, for entropy encoding XML
information. Using a relatively simple algorithm, which is amenable to
fast and compact implementation, and a small set of datatype
representations, it reliably produces efficient encoding of XML event
streams. The grammar production system and format definition of EXI
are presented.
--
Ian Jacobs (<a class="moz-txt-link-abbreviated" href="mailto:ij@w3.org">ij@w3.org</a>) <a class="moz-txt-link-freetext" href="http://www.w3.org/People/Jacobs/">http://www.w3.org/People/Jacobs/</a>
Tel: +1 718 260 9447
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