Add enableWhen ruleset

Examples/Rule Sets/Questionnaires/enableWhen.fsh

@@ -0,0 +1,59 @@
+// this question will only be shown when another question has been answered as 'true'
+RuleSet: enableWhenCode(question, code)
+* enableWhen
+  * question = "{question}"
+  * operator = #=
+  * answerBoolean = {code}
+
+RuleSet: enableWhenComorbidity(code)
+* insert enableWhenCode(comorbidities, {code})
+
+ValueSet: ComorbidityHistory
+Id: ComorbidityHistory
+Title: "Comorbidity history"
+Description: "Documented history of comorbidities"
+* ^copyright = "This value set includes content from SNOMED CT, which is copyright © 2002+ International Health Terminology Standards Development Organisation (IHTSDO), and distributed by agreement between IHTSDO and HL7. Implementer use of SNOMED CT is not covered by this agreement"
+* include SCT#363443007 "Malignant tumour of ovary"
+* include SCT#35489007  "Depression"
+
+Instance: TestQuestionnaire
+InstanceOf: Questionnaire
+Usage: #definition
+Description: "Test Questionnaire to demonstrate enableWhen"
+
+* name = "TestQuestionnaire"
+* title = "Test Questionnaire to demonstrate enableWhen"
+* status = #draft
+
+* item[+]
+  * linkId = "general-information"
+  * type = #group
+  * text = "General information"
+  * required = true
+
+  * item[+]
+    * linkId = "age-known"
+    * type = #boolean
+    * text = "Do you remember how old you are?"
+    * required = true
+
+  * item[+]
+    * linkId = "age"
+    * type = #integer
+    * text = "So how old are you?"
+    * required = true
+    * insert enableWhenCode(age-known, true)
+
+  * item[+]
+    * linkId = "comorbidities"
+    * type = #choice
+    * text = "Have you been told by a doctor that you have any of the following?"
+    * answerValueSet = Canonical(ComorbidityHistory)
+    * required = true
+    * repeats = true
+
+  * item[+]
+    * linkId = "depression-treatment"
+    * type = #boolean
+    * text = "Do you receive treatment for depression?"
+    * insert enableWhenComorbidity(SCT#35489007)