Glenn Handrahan is a Research Engineer assigned to provide expertise to various US Navy XML initiatives. These include the Technical Data Knowledge Management program and the Tech Data/Training Integration program. Furthermore, he is researching the applicability of the Shareable Content Object Reference Model as it may apply to the Navy's technical data community. For each of these efforts, Mr. Handrahan is investigating the generation and population of metadata fields using both human-generated (via controlled vocabularies) and machine-generated (via semantic tagging applications) methods. Mr. Handrahan formerly was a Navy representative on the Joint Interoperable Architecture committee.