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Last edited by Nick Wellnhofer 3 months ago
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HOME




OFFICIAL RELEASES

Official releases can be downloaded from
https://download.gnome.org/sources/libxml2/


HTML DOCUMENTATION

Generated HTML documentation is available via GitLab Pages:

 * API documentation
 * Tutorial
 * Examples
 * xmllint man page
 * xmlcatalog man page


HISTORY

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
MIT License. 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 variety of
language bindings make it available in other environments.

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,
RISC Os, OS/2, VMS, QNX, MVS, ...)

Libxml2 implements a number of existing standards related to markup languages:

 * the XML 1.0 standard: https://www.w3.org/TR/REC-xml
 * Namespaces in XML 1.0: https://www.w3.org/TR/REC-xml-names/
 * XML Base: https://www.w3.org/TR/xmlbase/
 * RFC 2396: Uniform Resource Identifiers https://www.ietf.org/rfc/rfc2396.txt
 * XML Path Language (XPath) 1.0: https://www.w3.org/TR/xpath
 * HTML4 parser: https://www.w3.org/TR/html401/
 * XML Pointer Language (XPointer) Version 1.0: https://www.w3.org/TR/xptr
 * XML Inclusions (XInclude) Version 1.0: https://www.w3.org/TR/xinclude/
 * ISO-8859-x encodings, as well as rfc2044 [UTF-8] and rfc2781 [UTF-16] Unicode
   encodings, and more if using iconv support
 * part of SGML Open Technical Resolution TR9401:1997
 * XML Catalogs Working Draft 06 August 2001:
   https://www.oasis-open.org/committees/entity/spec-2001-08-06.html
 * Canonical XML Version 1.0: https://www.w3.org/TR/xml-c14n and the Exclusive
   XML Canonicalization CR draft https://www.w3.org/TR/xml-exc-c14n
 * Relax NG, ISO/IEC 19757-2:2003,
   https://www.oasis-open.org/committees/relax-ng/spec-20011203.html
 * W3C XML Schemas 1.0: https://www.w3.org/TR/xmlschema-0/
 * W3C xml:id Working Draft 7 April 2004

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 OASIS XML Tests Suite.

To some extent libxml2 provides support for the following additional
specifications but doesn't claim to implement them completely:

 * Document Object Model (DOM) https://www.w3.org/TR/DOM-Level-2-Core/ the
   document model, but it doesn't implement the API itself, gdome2 does this on
   top of libxml2
 * RFC 959 : libxml2 implements a basic FTP client code
 * RFC 1945 : HTTP/1.0, again a basic HTTP client code
 * SAX: a SAX2 like interface and a minimal SAX1 implementation compatible with
   early expat versions

Here are some key points about libxml:

 * Libxml2 exports Push (progressive) and Pull (blocking) type parser interfaces
   for both XML and HTML.
 * Libxml2 can do DTD validation at parse time, using a parsed document
   instance, or with an arbitrary DTD.
 * Libxml2 includes complete XPath 1.0, XPointer and XInclude 1.0
   implementations.
 * It is written in plain C, making as few assumptions as possible, and sticking
   closely to ANSI C/POSIX for easy embedding. Works on Linux/Unix/Windows,
   ported to a number of other platforms.
 * Basic support for HTTP and FTP client allowing applications to fetch remote
   resources.
 * The design is modular, most of the extensions can be compiled out.
 * The internal document representation is as close as possible to the DOM
   interfaces.
 * Libxml2 also has a SAX like interface; the interface is designed to be
   compatible with Expat.
 * This library is released under the MIT License. See the Copyright file in the
   distribution for the precise wording.


LANGUAGE BINDINGS

There are a number of language bindings and wrappers available for libxml2, the
list below is not exhaustive.

 * Libxml++ seems the most up-to-date C++ bindings for libxml2, check the
   documentation and the examples.
 * xmlwrapp, a C++ library built atop libxml2.
 * XML::LibXML Perl bindings are available on CPAN, as well as XML::LibXSLT Perl
   libxslt bindings.
 * If you're interested into scripting XML processing, have a look at XSH an XML
   editing shell based on Libxml2 Perl bindings.
 * Petr Kozelka provides Pascal units to glue libxml2 with Kylix, Delphi and
   other Pascal compilers.
 * Uwe Fechner also provides idom2, a DOM2 implementation for Kylix2/D5/D6 from
   Borland.
 * There are bindings for Ruby and libxml2 bindings are also available in Ruby
   through Nokogiri.
 * Steve Ball and contributors maintains libxml2 and libxslt bindings for Tcl.
 * libxml2 and libxslt are the default XML libraries for PHP5.
 * LibxmlJ is an effort to create a 100% JAXP-compatible Java wrapper for
   libxml2 and libxslt as part of GNU ClasspathX project.
 * Patrick McPhee provides Rexx bindings for libxml2 and libxslt, look for
   RexxXML.
 * Satimage provides XMLLib osax. This is an osax for Mac OS X with a set of
   commands to implement in AppleScript the XML DOM, XPATH and XSLT. Also
   includes commands for Property-lists (Apple's fast lookup table XML format.)
 * Francesco Montorsi developed wxXml2 wrappers that interface libxml2, allowing
   wxWidgets applications to load/save/edit XML instances.


CONTRIBUTIONS

 * Bjorn Reese, William Brack and Thomas Broyer have provided a number of
   patches, Gary Pennington worked on the validation API, threading support and
   Solaris port.
 * John Fleck helps maintaining the documentation and man pages.
 * Igor Zlatkovic is now the maintainer of the Windows port, he provides
   binaries
 * Felix Natter and Geert Kloosterman provide an emacs module to lookup
   libxml(2) functions documentation
 * Ziying Sherwin provided man pages
 * Dave Kuhlman provided the first version of libxml/libxslt wrappers for Python
 * Aleksey Sanin implemented the XML Canonicalization and XML Digital Signature
   implementations for libxml2

Clone repository
 * Architecture
 * Catalog support
 * Encodings support
 * Entities
 * FAQ
 * IO interfaces
 * Memory management
 * Namespaces
 * Parser interfaces
 * Python bindings
 * Reader Interface
 * SAX interface
 * Thread safety
 * Tree structure
 * Validation and DTDs

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