Applies To: SQL Server 2014, SQL Server 2016 Preview
Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).
Reconstructs all the schemas or a specific schema in the specified XML schema collection. This function returns an xml data type instance.
Applies to: SQL Server (SQL Server 2008 through current version).
When you import XML schema components in the database by using CREATE XML SCHEMA COLLECTION or ALTER XML SCHEMA COLLECTION, aspects of the schema used for validation are preserved. Therefore, the reconstructed schema may not be lexically the same as the original schema document. Specifically, comments, white spaces, and annotations are lost; and implicit type information is made explicit. For example, <xs:element name="e1" /> becomes <xs:element name="e1" type="xs:anyType"/>. Also, namespace prefixes are not preserved.
If you specify a namespace parameter, the resulting schema document will contain definitions for all schema components in that namespace, even if they were added in different schema documents or DDL steps, or both.
You cannot use this function to construct XML schema documents from the sys.sys XML schema collection.
The following example retrieves the XML schema collection ProductDescriptionSchemaCollection from the production relational schema in the AdventureWorks2012 database.
USE AdventureWorks2012; GO SELECT xml_schema_namespace(N'production',N'ProductDescriptionSchemaCollection'); GO