It consists of:
- Common CDA Header
- Common Library of CDA Sections (PRSB, plus others)
- Common Library of CDA Coded Entries (PRSB assured plus other legacy ones)
The generic Structured Headings CDA model itself is not meant for implementation, but is constrained by a profile specification that allows the model to be constrained to specific use cases. This profile specification is rule based and consists of a series of assertions against the base model, for example this details which section can or cannot be present, which coded entries can or cannot be present, and so on.