W3C XML Schema activity

May 27, 2021 W3C Standard

XML Schema is an XML-based DTD alternative.

XML Schema tutorial

To learn more about XML Schema, read our XML Schema tutorial.

XML 1.0 supports DTDs that define document structures.

XML Schema has better support for applications, document structures, properties, and data types.

Future versions of XML depend on XML Schema to define the type of XML document.

The structure of XML Schema (XML Schema Structure) defines the definition language of XML Schema.
XML Schema's data types specify extensable data types for XML.

specification	Draft / proposal	Recommended time
XML Schema (XSD)		02. May 2001
XML Schema 1.0: Structures		02. May 2001
XML Schema 1.0: Datatypes		02. May 2001

XML Schema (2.Ed)		28. Oct 2004
XML Schema Structures (2.Ed)		28. Oct 2004
XML Schema Datatypes (2.Ed)		28. Oct 2004

XML Schema Component Designators	19. Jan 2010

XML Schema 1.1: Structures	21. Jul 2011
XML Schema 1.1: Datatypes	21. Jul 2011