Annotated XSD Schemas in SQLXML 4.0
Applies to: 
SQL Server
Azure SQL Database
This section provides information about using annotated XSD schemas in SQLXML 4.0. In previous versions of SQLXML, similar functionality was provided with XML-Data Reduced (XDR) schemas. This section also provides XDR information for legacy applications.
In This Section
Introduction to Annotated XSD Schemas (SQLXML 4.0)
Provides an overview of annotated XSD schemas in SQLXML 4.0.
Using Annotations in XSD Schemas (SQLXML 4.0)
Describes how to use annotations in XSD schemas in numerous scenarios, and provides examples.
Using Annotated XSD Schemas in Queries (SQLXML 4.0)
Describes how to use annotated XSD schemas in queries.
Converting Annotated XDR Schemas to Equivalent XSD Schemas (SQLXML 4.0)
Describes how to convert XDR schemas to the equivalent XSD schemas for SQLXML 4.0.
Annotated XDR Schemas (Deprecated in SQLXML 4.0)
Previous versions of SQLXML supported annotations in XDR schemas. Annotated XDR schemas are deprecated in SQLXML 4.0, but this section is provided as a reference for legacy applications.
Other Resources
You can find more information about XML Schema Definition language (XSD), XML Path language (XPath), and Extensible Stylesheet Language Transformations (XSLT) at the following Web sites:
XML Schema Part 0: Primer, W3C Recommendation (https://www.w3.org/TR/xmlschema-0/)
XML Schema Part 1: Structures, W3C Recommendation (https://www.w3.org/TR/xmlschema-1/)
XML Schema Part 2:Datatypes, W3C Recommendation (https://www.w3.org/TR/xmlschema-2/)
XML Path Language (XPath) (https://www.w3.org/TR/xpath)
XSL Transformations (XSLT) (https://www.w3.org/TR/xslt)