Coding Rationale for why a code is provided (CD and PQ/PQR)
crO: Original : Originally produced code
crP: Post-coded : post-coded from free text source
crR: Required : Required by the specification describing the use of the coded concept.The exact form of the requirement is not specified here; it may be required by the specification directly, or it may arise as an indirect result of other conformance tools. More than one different requirement may exist simultaineously, so more than one code in a CD complex may be required
crOR: Original & Required :Originally produced code, required by the specification describing the use of the coded concept.
crPR: Post-coded & Requierd : post-coded from free text source, required by the specification describing the use of the coded concept