Stream: implementers
Topic: Defining compositional CodeSystems
Noemi Deppenwiese (May 07 2020 at 12:01):
The CodeSystem resource does have a compositional attribute, but the comment says "Note that the code system resource does not define what the compositional grammar is, only whether or not there is one." So where is the grammar defined? Just free text in the description or is there a more formal way to do this (except linking to some non-FHIR definition..)
Grahame Grieve (May 08 2020 at 02:30):
usually, grammar are associated with fully specified code systems that are not defined via code systems - SNOMED, UCUM, media type, ICD-9 etc. There's a mix of how to do this, in terms of formal grammars or not, but there's always textual explanation. I would expect the narrative description to link to descriptions of the grammar.
Grahame Grieve (May 08 2020 at 02:30):
FHIR never defined a formal uber grammar because even the simple ones I'd seen were horrifying.
Noemi Deppenwiese (May 08 2020 at 06:45):
Ok, thanks!
Last updated: Apr 12 2022 at 19:14 UTC
