The Artemis http://www.srdc.metu.edu.tr/webpage/projects/artemis/ medical ontology project is "a European Commission funded project that aims to define a semantic web service-based P2P signal infrastructure for interoperability of medical information systems. Among its main purposes are:
  1. provide interoperability of medical information systems through semantically enriched web services (using a two phase process through, first a Message Ontology Mapping Process and then a Message Instance Mapping);
  2. to find and retrieve clinical information about a particular patient from different healthcare organizations where concrete sources are unknown.