GSRC bookshelf: XML resources

XML FAQ
Intro 1, Intro 2, Intro 3, more intros
IBM Tutorials
What's new in TAG land? Intro to newer XML-related features (namespaces, XSLT, DOM etc)
XML 1.0 specs (annotated version)
XML launch pad
Canonical XML, XML parser tests
Web-based XML validation (another one)
XML from W3C and other references and standards
Books, Tutorials, Info
XML browsers: MS IE 5.0 (Windows, Solaris)
XML parsers: libxml (C), Aelfred and XP (in Java), expat (parser toolkit in C), XML4C (in C++).
    Also see C and Java codes available IBM and from Oracle.
Perl & XML
More free XML software
XML resources and tools
SGML/XML resources
More XML resources from xml.org