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<h1>The XML C parser and toolkit of Gnome</h1>
<h2>libxml</h2>
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<a href="http://mail.gnome.org/archives/xml/">Mail archive</a>
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<p></p>
<p style="text-align: right; font-style: italic; font-size: 10pt">"Programming
with libxml2 is like the thrilling embrace of an exotic stranger." <a href="http://diveintomark.org/archives/2004/02/18/libxml2">Mark
Pilgrim</a></p>
<p>Libxml2 is the XML C parser and toolkit developed for the Gnome project
(but usable outside of the Gnome platform), it is free software available
under the <a href="http://www.opensource.org/licenses/mit-license.html">MIT
License</a>. XML itself is a metalanguage to design markup languages, i.e.
text language where semantic and structure are added to the content using
extra "markup" information enclosed between angle brackets. HTML is the most
well-known markup language. Though the library is written in C <a href="python.html">a variety of language bindings</a> make it available in
other environments.</p>
<p>Libxml2 is known to be very portable, the library should build and work
without serious troubles on a variety of systems (Linux, Unix, Windows,
CygWin, MacOS, MacOS X, RISC Os, OS/2, VMS, QNX, MVS, VxWorks, ...)</p>
<p>Libxml2 implements a number of existing standards related to markup
languages:</p>
<ul><li>the XML standard: <a href="http://www.w3.org/TR/REC-xml">http://www.w3.org/TR/REC-xml</a></li>
<li>Namespaces in XML: <a href="http://www.w3.org/TR/REC-xml-names/">http://www.w3.org/TR/REC-xml-names/</a></li>
<li>XML Base: <a href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a></li>
<li><a href="http://www.cis.ohio-state.edu/rfc/rfc2396.txt">RFC 2396</a> :
Uniform Resource Identifiers <a href="http://www.ietf.org/rfc/rfc2396.txt">http://www.ietf.org/rfc/rfc2396.txt</a></li>
<li>XML Path Language (XPath) 1.0: <a href="http://www.w3.org/TR/xpath">http://www.w3.org/TR/xpath</a></li>
<li>HTML4 parser: <a href="http://www.w3.org/TR/html401/">http://www.w3.org/TR/html401/</a></li>
<li>XML Pointer Language (XPointer) Version 1.0: <a href="http://www.w3.org/TR/xptr">http://www.w3.org/TR/xptr</a></li>
<li>XML Inclusions (XInclude) Version 1.0: <a href="http://www.w3.org/TR/xinclude/">http://www.w3.org/TR/xinclude/</a></li>
<li>ISO-8859-x encodings, as well as <a href="http://www.cis.ohio-state.edu/rfc/rfc2044.txt">rfc2044</a> [UTF-8]
and <a href="http://www.cis.ohio-state.edu/rfc/rfc2781.txt">rfc2781</a>
[UTF-16] Unicode encodings, and more if using iconv support</li>
<li>part of SGML Open Technical Resolution TR9401:1997</li>
<li>XML Catalogs Working Draft 06 August 2001: <a href="http://www.oasis-open.org/committees/entity/spec-2001-08-06.html">http://www.oasis-open.org/committees/entity/spec-2001-08-06.html</a></li>
<li>Canonical XML Version 1.0: <a href="http://www.w3.org/TR/xml-c14n">http://www.w3.org/TR/xml-c14n</a>
and the Exclusive XML Canonicalization CR draft <a href="http://www.w3.org/TR/xml-exc-c14n">http://www.w3.org/TR/xml-exc-c14n</a></li>
<li>Relax NG, ISO/IEC 19757-2:2003, <a href="http://www.oasis-open.org/committees/relax-ng/spec-20011203.html">http://www.oasis-open.org/committees/relax-ng/spec-20011203.html</a></li>
<li>W3C XML Schemas Part 2: Datatypes <a href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/">REC 02 May
2001</a></li>
<li>W3C <a href="http://www.w3.org/TR/xml-id/">xml:id</a> Working Draft 7
April 2004</li>
</ul>
<p>In most cases libxml2 tries to implement the specifications in a
relatively strictly compliant way. As of release 2.4.16, libxml2 passed all
1800+ tests from the <a href="http://www.oasis-open.org/committees/xml-conformance/">OASIS XML Tests
Suite</a>.</p>
<p>To some extent libxml2 provides support for the following additional
specifications but doesn't claim to implement them completely:</p>
<ul><li>Document Object Model (DOM) <a href="http://www.w3.org/TR/DOM-Level-2-Core/">http://www.w3.org/TR/DOM-Level-2-Core/</a>
the document model, but it doesn't implement the API itself, gdome2 does
this on top of libxml2</li>
<li><a href="http://www.cis.ohio-state.edu/rfc/rfc959.txt">RFC 959</a> :
libxml2 implements a basic FTP client code</li>
<li><a href="http://www.cis.ohio-state.edu/rfc/rfc1945.txt">RFC 1945</a> :
HTTP/1.0, again a basic HTTP client code</li>
<li>SAX: a SAX2 like interface and a minimal SAX1 implementation compatible
with early expat versions</li>
</ul>
<p>A partial implementation of <a href="http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/">XML Schemas Part
1: Structure</a> is being worked on but it would be far too early to make any
conformance statement about it at the moment.</p>
<p>Separate documents:</p>
<ul><li><a href="http://xmlsoft.org/XSLT/">the libxslt page</a> providing an
implementation of XSLT 1.0 and common extensions like EXSLT for
libxml2</li>
<li><a href="http://gdome2.cs.unibo.it/">the gdome2 page</a>
: a standard DOM2 implementation for libxml2</li>
<li><a href="http://www.aleksey.com/xmlsec/">the XMLSec page</a>: an
implementation of <a href="http://www.w3.org/TR/xmldsig-core/">W3C XML
Digital Signature</a> for libxml2</li>
<li>also check the related links section for more related and active
projects.</li>
</ul>
<p> Hosting sponsored by <a href="http://www.aoemedia.de/opensource-cms.html">Open Source CMS services</a> from AOE media.</p>
<p>Logo designed by <a href="mailto:liyanage@access.ch">Marc Liyanage</a>.</p>
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