Resumen
This article addresses key architectural aspects of integration and interoperability encountered during the Government-wide Computer-based Project (GCPR). For a single sign-on system to be implemented, for example, the various security policies and procedures associated with certification and authentication of legitimate system users had to be reconciled. Unlike a typical hospital e-record system, the GCPR project required the formation of an architecture that allowed for the sharing and integration of a patient's e-record among three federal health care agencies. The need for interoperability led to the selection of the Reference Model for Open Distributed Processing (RM-ODP), an ISO standard, as the best suited framework because it spanned the entire gamut of interoperability concerns mentioned. The information viewpoint captures the information shared between Open Distributed Processing (ODP) applications in terms of metadata, states and structures of an object.