The PIXPDQDomainLookupEJB project defines an EJB to resolve the domain identification differences between the HL7 messages and the system codes used by the Sun Master Index. The Sun Master Index typically uses the namespace ID field of the domain identifier to locate a system, but the domain identifier includes two additional fields, universal ID and ID type. This EJB module resolves the identification information (namespace ID, universal ID, and ID type) for the domains in the incoming data and then resolves the information again for outbound data. The JAR file from this project is deployed to the application server.