cqframework / cqframework/cql-execution
Support Descendents
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- Dominant language
- JavaScript
- Stars
- 84
- Forks
- 38
- Avg merge
- 1d 20h
- Merged PRs (30d)
- 1
Description
The Descendents operator was introduced to support [FHIRPath descendants(https://hl7.org/fhirpath/#descendants-collection) but is accessible from standard CQL via the following syntax:
SomeTupleOrList.descendents()
It seems it is seldom used, but we should consider supporting it.
NOTE: The CQL spec spells it descendents, but the FHIRPath spec spells it descendants. The CQL translator only supports the spelling: descendents.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the CQL Descendents and FHIRPath descendants references in the issue, then locate how the JavaScript executor handles the SomeTupleOrList.descendents() form. Done means the CQL spelling is supported consistently and the operator executes correctly for the described collection input.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- backend
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100