Canonical XML, Version 1.0 - (W3C Recommendation) designed to encode the logical structure of XML documents so that two XML documents whose Canonical-XML form is identical will be considered equivalent for the purposes of many applications, particularly for ensuring the integrity of data traveling between XML processors for applications such as electronic commerce
Datatypes for DTDs (DT4DTD) 1.0 - (W3C Note) allows legacy systems that may presently be unable to convert their DTD markup declarations to XML Schema, to utilize XML Schema conformant datatypes
Directory of XML Resources - claims to be the "largest directory of XML resources," including links to dtd, xsl, xslt, asp, xml tutorials, parsers, editors, programming, basics, script, parsers, browsers, applications, java, and industry resources
Exclusive XML Canonicalization, Version 1.0 - (W3C Recommendation) augments the Canonical XML Recommendation to better enable a portion of an XML document to be as portable as possible while preserving the digital signature, and works with XML Signature
Minimal XML 1.0 - subset of XML 1.0; including features essential for data interchange applications, and excluding non-essential features that are arcane, legacy-related, problematic for data interchange applications, or redundant
XML Cover Pages - Robin Cover - comprehensive online reference work for XML and SGML, features extensive documentation on the application of standards such as XSL, XSLT, XPath, XLink, XPointer, HyTime, DSSSL, CSS, SPDL, CGM and ISO-HTML
XML Events - (W3C Working Draft as of 2002-08-20) defines a module used to associate behaviors with document-level markup through DOM Level 2 event model support
XML Fragment Interchange - (W3C Candidate Recommendation as of 2001-02-20) supports logical documents composed of possibly several entities
XML.Gov - purpose is to facilitate the efficient and effective use of XML through cooperative efforts among government agencies, including partnerships with commercial and industrial organizations
XML Information Set - (W3C Proposed Recommendation as of 2001-08-17) describes an abstract data set of eleven types of information items available from an XML document
XML Inclusions (XInclude) Version 1.0 - (W3C Working Draft as of 2001-05-22) specifies a processing model and syntax for general purpose inclusion, which is accomplished by merging a number of XML Infosets into a single composite Infoset
XML Messaging Specification (XMSG) - (W3C Note as of 2001-02-20) specification for using XML to send messages that contain a set of XML documents, embedded non-XML data, and references to non-XML documents in a fashion that supports scalable transactions and operates on a participant model
XML.org - reference for XML vocabularies, DTDs, schemas, and namespaces