XPath, XPointer, XQL, XQuery

DSML, ebXML, OpenOffice XML, VoiceXML, XUL, ACORD XML Standards, Adex, AIML - Astronomical Instrument Markup Language, BSML - Bioinformation Sequence Markup Language, CDF - Channel Definition Format, CIDX: Chemical Industry Data Exchange, CML - Chemical Markup Language, DARPA Markup Language (DAML+OIL), DITA - Darwin Information Typing Architecture, DocBook XML

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Extensible 3D (X3D), W3C Data Formats, W3C XML Specifications, Proposals and Vocabularies, XML Exchange Table DTD Module, XML Resume Library, XML Software Autoupdate, XML.org: XML Catalog

Character Encoding, XML, and MSXML, Chinese XML FAQ (in English), Entry-Level Unicode for XML, Expressing Simple Dublin Core in RDF/XML, History of Unicode Standard(s), ISO 8859 Alphabet Soup, The Unicode Consortium, W3Schools.com: XML Encoding, What ASN.1 can offer to XML, XER - XML Encoding Rules

Articles, FAQs, Help, and Tutorials, Implementations, Resources, XFA-Template Version 1.0, XForms, XForms 1.0, XForms Requirements

XLink, SkunkLink, Very Extensible Linking Language Unafraid of Marku

irt.org: XML Namespaces : Universal Identificatio, Microsoft XML 3.0: Using Namespaces in Documents, MSDN: The XML Files: Understanding XML Namespaces, Namespaces in XML, Namespaces in XML (alternate explanation), W3Schools.com: XML Namespaces, XML Cover Pages: Namespaces in XML, XML Namespace Related-resource Language (XNRL), XML Namespaces FAQ, XML.com: Namespace Myths Exploded

Articles, Books, Cafe con Leche, IT World: XML in Practice, NewsNow NewsLink, SGML and XML News, VBXML.com: xmlNews, VoiceXML Review, XML Developer, XML Magazine, XML Sucks, XML.org: News

Bray, Tim, Clark, James, Colan, Mark, Dumbill, Edd, Maloney, Murray, Rein, Lisa, Tauber, James, Tobin, Richard

eXtensible Programming Language, SAX, XML-RPC

Working Drafts, Associating Style Sheets with XML Documents., Canonical XML Version 1.0, Startkabel: XML Spec, The Annotated XML Specification (version 1.0), W3C Technical Reports and Publications, XML 1.0 (Second Edition), XML Base, XML Fragment Interchange, XML Information Set (InfoSet), XML-Signature Syntax and Processing

Chats and Forums, Conferences, FAQs, Help, and Tutorials, Mailing Lists, Sample Code, Schools and Instruction, Anuj Executive Seminars, BizTalk, BizTalk Users Group, carriglearning: XML Training Solution, Cetus Links, Charles F. Goldfarb's XMLTimes.com, CodeHound XML, DevASP for XML Developers, DevASP Search Index for XML Developers, Extensible Markup Language (XML)

XSL, Associating Style Sheets with XML documents Versio, Choosing Between CSS and XSL, Finetuning.com XSL and CSS Stylesheet Resources, XML Script, XSL Developer's Guide

Browsers, Editors, Parsers, Publishing Systems, Servers, Apache XML Project, Breeze Factor, dArcBlue, DeltaXML: XML file comparison, easyXML Bean Suite, ExamXML, Fancy XML Tree Viewer, fase4, Free XML Tools and Software, GSLgen: General-purpose Schema Language generator

RELAX NG, Schematron, XML Schema, Comparative Analysis of Six XML Schema Languages, DCD - Document Content Description for XML, DSD - Document Structure Description, Examplotron, Schemachine, SOX - Schema for Object-Oriented XML 2.0, Systemwire xlinkit, XDR - XML-Data / XML-Data Reduced, XML Well-Formedness Checker and Validator

AEL Data: XML Conversion, ArborText, Computing Art Inc, CUESoft - XML Solutions, Data conversion to XML, ElCel Technology, Fourthought, Galdos, HostBridge Technologies, I Tech Zone