Metadata Model Containment Hierarchy
The XML schema and the metadata object models map closely to one another and to the Metadata Model described in this section. There are 13 metadata objects in the schema.
You might want to keep a printout of the AdventureWorks SQL Server 2000 Sample XML and the XSD available when you read about the key objects of the metadata model. You can find the BdcMetadata.XSD file typically at
%ProgramFiles%\Microsoft Office Server\12.0\Bin.
The following figure shows the metadata model.
The SourceEntity and DestinationEntity objects are both instances of the Entity metadata object.