Who maintains the UML specification and how is it updated?
The Object Management Group (OMG) maintains the UML specification. As with any OMG specification, minor revisions to UML are effected by Revision Task Forces (RTFs) and major revisions are effected by Requests for Proposals (RFPs). The OMG process for revising UML is explained in the article “UML 2001: A Standardization Odyssey,” by Cris Kobryn, which can be downloaded from the Papers & Articles page of this web.