This document discusses name space management in the Recursive InterNetwork Architecture (RINA). It describes how name space management distribution management systems (NSM-DMSs) can manage application name spaces that span multiple DIFs. NSM-DMSs allow applications to discover other applications across DIF boundaries. They authenticate applications, manage policies for updating name space data, and help determine which DIFs are needed between applications. For large systems, some NSM-DAPs contain only local information while others aggregate information. Queries are forwarded between these to discover applications. Creation of supporting DIFs may also be needed between source and destination applications. The document compares this application discovery approach to the current DNS system and discusses