The Modular Information Provider (MIP) has been developed to systematically aggregate multiple sources of information for Grid information services (GIS). MIP undertakes the challenge of mapping information from a large number of sources to information services with minimal human intervention. MIP addresses such mappings using a modular approach to achieve interoperability among Grid environments. MIP can be customized in a straightforward way to a specific Grid environment or information schema. Current MIP implementation is based on Globus MDS4 and the