Stream: shorthand
Topic: Having trouble binding a parameter to a valueset
Matt Jenks (Oct 19 2021 at 00:17):
Hi. I'm trying to use fsh to define a simple operation where a parameter is bound to a valueset. I don't understand how to set the BindingBackbone to a valueset that I have created and make the strength required. I am receiving the error "Sushi: error Cannot find definition for Instance: SCTConditionVS. Skipping rule."
Here's my fsh that I am trying to create ...
Alias: $SCT = http://snomed.info/sct
ValueSet: SCTConditionVS
Id: sct-conditions
Title: "SNOMED Conditions"
Description: "The list of possible condition codes from SNOMED"
- $SCT#44054006 "Diabetes mellitus type 2 (disorder)"
Instance: GuidanceResponse-Evaluate
InstanceOf: OperationDefinition
Description: "Retrieve all recommendations for a patient"
Usage: #definition
- name = "Find_NBAs_patient"
- title = "Obtain the recommendations for a patient"
- status = #draft
- kind = #operation
- code = #evaluate
- system = false
- type = true
- instance = false
- resource[0] = #GuidanceResponse
// Parameter: Condition Code
- parameter[+].name = #condition_code
- parameter[=].use = #in
- parameter[=].min = 0
- parameter[=].max = "1"
- parameter[=].documentation = "The condition code to look for guidance on"
- parameter[=].type = #code
- parameter[=].binding.strength = #required
- parameter[=].binding.valueSet = SCTConditionVS
Any guidance would be appreciated in setting the binding. Thanks.
Chris Moesel (Oct 19 2021 at 12:06):
Hi @Matt Jenks. OperationDefinition.parameter.binding.valueSet is a canonical type. As such, you need to use the Canonical(...) operator in FSH like so:
* parameter[=].binding.valueSet = Canonical(SCTConditionVS)
This signals that you're not putting the whole value set inline, but rather just its canonical URL.
Last updated: Apr 12 2022 at 19:14 UTC
