Techquila XML Schema Spec Browser
- Multi-modal topic map browser for the W3C XML Schema specifications, including indexes of the terms used by the specifications and the main concepts of XML Schema.
- http://www.techquila.com/topicmaps/xmlschema/

Errata in XML Schema
- List of errata in the W3C XML Schema recommendation of 2 May 2001
- http://www.w3.org/2001/05/xmlschema-errata

XML Schema Requirements
- Describes the requirements on which the W3C XML Schema recommendation is based. (W3C Note 15 February 1999)
- http://www.w3.org/TR/NOTE-xml-schema-req

XML Schema Part 1: Structures
- Specifies the XML Schema definition language, which offers facilities for describing the structure and constraining the contents of XML 1.0 documents. (W3C Recommendation 2 May 2001)
- http://www.w3.org/TR/xmlschema-1/

XML Schema Part 0: Primer
- Part of the official XML Schema definition. A non-normative document intended to provide an easily readable description of the XML Schema facilities. (W3C Recommendation 2 May 2001)
- http://www.w3.org/TR/xmlschema-0/

XML Schema Part 2: Datatypes
- Part 2 of the specification of the XML Schema language. It defines facilities for defining datatypes to be used in specifications. (W3C Recommendation 2 May 2001)
- http://www.w3.org/TR/xmlschema-2/

XML Schema: Formal Description
- Formalization of a formal, declarative system for describing and naming XML Schema information, specifying XML instance type information, and validating instances against schemas. (W3C Working Draft, 25 September 2001)
- http://www.w3.org/TR/xmlschema-formal/