Integrated network management frameworks for selfmanaging systems in a grid environment consisting of disparate applications, devices and subsystems require the use of a common definition of these managed resources. The Common Information Model (CIM) provides such a standard for their description. However, the CIM specification lacks formalism which limits its use in knowledge aggregation and reasoning. This paper discusses the design of a repository adapter for resource information modeled in CIM. The adapter translates CIM constructs to an ontology-based language, the Data Centre Markup Language (DCML), thereby formalizing the model. Issues encountered during this process are identified and areas for future work are discussed.