Stream: fhirpath
Topic: Functions return collections?
Paul Lynch (Aug 09 2018 at 18:09):
The documentation for most of the 5.1 Existence functions say they return a boolean. For example, for exists(), it says, "Returns true if the collection has any elements, and false otherwise." Does this mean it returns a collection with a single boolean (sort of like count() returns a collection with an integer) or does it really return a plain boolean? 3.1 says, "the result of every expression is a collection, even if that expression only results in a single element". I am wondering if the documentation should be clarified for the 5.1 functions, or whether they really do deviate from the rule in 3.1.
Grahame Grieve (Aug 09 2018 at 18:55):
they don't deviate
Last updated: Apr 12 2022 at 19:14 UTC
