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code_x MATCHES {terminology://system=http://systema.org/systema?system_version=0.1?valueset=http://somthing.org/vsA/0_1?vs_version=1.2}
Definition of parameters:
code_x: the code to check if it belongs to the set of codes represented by the result of the TS request.
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In Example 1. code_x belongs to system A. System A has uri http://systemA.org/systemA), the version of system A considered is 0.1. The valueset uri is http://somthing.org/vsA. The version of the VS is 1.2.
There are two main scenarios:
- Explicit ValueSets (i.e. in a nutshell an explicit VS is cached list of codes with an id and some metadata like system, version, etc.):
terminology://system=http://snomed.info/sct/32506021000036107?system_version=20130531?valueset=http://highmed.org/24?vs_version=2.52
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2.Implicit ValueSets
terminology://system=http://snomed.info/sct/32506021000036107?system_version=20130531?valueset=http://snomed.info/sct?fhir_vs=isa/50697003
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In implicit ValueSets there is not a specific identified resource exposed by the terminology server that corresponds to the ValueSet. The ValueSet should be created “on demand” by the terminology server based on the logic expression specified in the URI.
Aspects to consider
QUESTION 1) An outstanding question is... if we just consider that the only operation will be $validate (i.e. validate if code is in the ValueSet and the request to the server only returns a boolean true/false) as per Diego (https://openehrspecs.slack.com/archives/C2CD84RUL/p1547819288129100 ), or we will also accept $expand (the server returns a list of codes, the format of the codes needs to be determined as per the discussion in https://openehrspecs.slack.com/archives/C2CD84RUL/p1549550758046800)??
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Alternatives have been proposed by Tom, Bjorn, and Ian in (https://openehrspecs.slack.com/archives/C2CD84RUL/p1549554234061500 , https://openehrspecs.slack.com/archives/C2CD84RUL/p1549552584056700?thread_ts=1549550758.046800&cid=C2CD84RUL , https://openehrspecs.slack.com/archives/C2CD84RUL/p1549551743054400?thread_ts=1549550758.046800&cid=C2CD84RUL )
EXAMPLES IN FHIR AND THE PROPOSAL FOR OPENEHR
EXAMPLES EXPLICIT VALUE SETS:
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