XML Schema is a DTD substitute based on XML. To learn more about XML Schema, please read our XML Schema tutorial. XML 1. 0 supports DTD that defines the structure of the document. XML Schema has better support for applications, document structures, properties, and data types. Future versions of XML rely on XML Schema to define the type of XML document. The structure (XML Schema Structure) of XML Schema specifies the definition language of XML Schema. The data type of XML Schema defines an extensible data type for XML. Standard Draft / proposal Recommended time XML Schema (XSD) May 2001 XML Schema 1.0: Structures May 2001 XML Schema 1.0: Datatypes May 2001 XML Schema (2.Ed) Oct 2004 XML Schema Structures (2.Ed) Oct 2004 XML Schema Datatypes (2.Ed) Oct 2004 XML Schema Component Designators Jan 2010 XML Schema 1.1: Structures Jul 2011 XML Schema 1.1: Datatypes Jul 2011 4.9.1. XML Schema tutorial ¶
4.9.2. XML Schema ¶
4.9.3. W3C XML specification and timeline ¶