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Difference between revisions of "FHIR Has Parameter Issue Page"

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* AND: return Observations for males who were born on 2011-01-01 (my preference)
 
* AND: return Observations for males who were born on 2011-01-01 (my preference)
 
* OR: return Observations for males and Observations for people born on 2011-01-01
 
* OR: return Observations for males and Observations for people born on 2011-01-01
 +
 +
CGG: Not sure of the etiquette for discussion pages...
 +
 +
We've implemented _has with the following rules:
 +
* _has and the first 2 modifiers define a search parameter "group", so in the above example, all query parms with <code>_has:Patient:subject</code> will be ANDed together.
 +
* The third modifier (and beyond) are treated as search parameters on the first modifier, and any search allowed on the first would be acceptable.  So this is valid:
 +
* Evaluate the deepest nestings first and work "up", similarly to chained parameters.
 +
 +
"Find all patients with observations of code in the given valueset"
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 +
<code>Patient?_has:Observation:subject:code:in=http://terms.mayo.edu/valueset/2.16.840.1.113883.3.2.11.4.37</code>
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as is:
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"Find all patients with observations made by the device with model 5000"
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<code>Patient?_has:Observation:subject:_has:Provenance:target:agent:Device.model=5000</code>
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And (AND at the nested level):
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"Find all patients with observations made by the device manufactured by ACME model 5000"
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<code>Patient?_has:Observation:subject:_has:Provenance:target:agent:Device.manufacturer=ACME&_has:Observation:subject:_has:Provenance:target:agent:Device.model=5000</code>

Latest revision as of 19:04, 10 May 2016

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This page contains discussion about issues and considerations related to HL7's FHIR specification. When adding content to a page, be sure to uncomment the "Active" category if it is commented (surrounded by <!-- and -->) so that others can notice it and participate too.

This is the discussion page to discuss the proposed _has parameter.

Discussion

  • Issue 1: Multiple _has to the same target type

If a query has two _has parameters which point to the same type, do they have an AND or an OR relationship on the target? In other words, given the following URL:

http://foo.com/Observation?_has:Patient:subject:gender=male&_has:Patient:subject:birthDate=2011-01-01

Does this URL mean

  • AND: return Observations for males who were born on 2011-01-01 (my preference)
  • OR: return Observations for males and Observations for people born on 2011-01-01

CGG: Not sure of the etiquette for discussion pages...

We've implemented _has with the following rules:

  • _has and the first 2 modifiers define a search parameter "group", so in the above example, all query parms with _has:Patient:subject will be ANDed together.
  • The third modifier (and beyond) are treated as search parameters on the first modifier, and any search allowed on the first would be acceptable. So this is valid:
  • Evaluate the deepest nestings first and work "up", similarly to chained parameters.

"Find all patients with observations of code in the given valueset"

Patient?_has:Observation:subject:code:in=http://terms.mayo.edu/valueset/2.16.840.1.113883.3.2.11.4.37

as is:

"Find all patients with observations made by the device with model 5000" Patient?_has:Observation:subject:_has:Provenance:target:agent:Device.model=5000

And (AND at the nested level):

"Find all patients with observations made by the device manufactured by ACME model 5000" Patient?_has:Observation:subject:_has:Provenance:target:agent:Device.manufacturer=ACME&_has:Observation:subject:_has:Provenance:target:agent:Device.model=5000

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