1. Introduction
When working with the NHS projects, I need to deal with a large number of linked schemas, particularly with domains that use the NHS Messaging Implementation Manual or the NHS Domain Messaging Specification. The MIM or DMS is pretty much the same, except MIM covers multiple domains while DMS only covers just one domain. MIM was firstly introduced to cover domains like EPS, Referral (Choice and Book), GP2GP, and PDS. Later one NHS agency chose to publish specification per domain thus DMS was introduced. MIM or DMS contains specification artifacts which are the output from HL7 V3 modelings such as interaction and messaging specification within a domain or multiple domains.