Key Element (XMLA)
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).
Contains a member key value for an attribute member.
The data type used by this element should match the data type of the appropriate key column of the specified attribute. If Key elements are not specified for a parent Attribute element, the AttributeName and Name elements specified in the parent Attribute element are used to identify the attribute member to be modified.