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CS API based on collapsed models

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  • If one were to create a programming API for RIM based models, one could base it on collapsed/flattened models instead of on a CIM. Code generation based on collapsed/flattened models results in smaller (more manageable) code.
  • Open question: could one use collapsed/flattened models in the CO and CP cells?

Related: MIF based code generation, New ITS


Lyssa K. Neel (CIHI), on the RFP for a Canadian tool based on this mechanism:

  • The "collapsed" MIF is described here Message_reshaping_rules
    • Grahame: More specifically, as implemented in the pan-Canadian schemas / Instance editor.
  • It does the following:
    1. Hide all fixed values from the application
    2. Where possible, expose data elements using business names, not HL7 names
    3. Simplify the object model by eliminating unnecessary nesting, 1..1 relationships and similar constructs
    4. etc.
  • This had been balloted as a "new ITS" but was rejected.
  • Mohawk College has a working version of such a system (called the "Everest Framework") available on their website:
    • During the Phoenix WGM (January 2010) Mohawk reported that initially their API was based on a mixture of collapsed-models and full v3 models. This only lead to confusion on the part of the implementers. Their conclusion: either hide all complexity (and use a simple DSL), or use the fullblown v3 models. Don't mix the two.