1.CDO> DELETE COLLECTION A_COLLECTION. In this example, the DELETE COLLECTION command deletes a collection that is not a member. 2.CDO> DELETE COLLECTION REGIONAL_SALES. CDO> DELETE COLLECTION DISTRICT_SALES. CDO> DELETE COLLECTION LOCAL_AREA_SALES. In this example, the DELETE COLLECTION command deletes a collection, a subcollection, and a further subcollection in sequence of ownership. 3.CDO> DELETE COLLECTION COMPILER_C(3). CDO> DELETE COLLECTION COMPILER_C(2:UPDATE_BRANCH:2). CDO> DELETE COLLECTION COMPILER(2:UPDATE_BRANCH:1). CDO> DELETE COLLECTION COMPILER_C(2). CDO> DELETE COLLECTION COMPILER(1). In this example, successive DELETE COLLECTION commands delete the main line and branch line versions of a collection in sequence of ownership. The branch line originates from version 2 and merges back in version 3.