A system and method for identifying duplicate or similar class instances existing in two or more Common Information Model (CIM) namespaces, accreting them, and thereafter returning a set of class instances and their associated information based on predetermined criteria. In different embodiments of the invention, an abstraction layer is implemented to provide a consolidation namespace operable to aggregate CIM instance data from two or more namespaces into a single namespace. A CIM client management application can then access and search the resulting consolidation namespace for all CIM class instances instead of iteratively browsing individual namespaces. A consolidation provider queries CIM namespaces to enumerate instances of CIM namespaces, which are consolidated in the Interop namespace, and similarly enumerates class instance data, which is consolidated in the consolidation namespace.