# Selectivity Form Code System - Using CQL With FHIR v3.0.0-ballot

## CodeSystem: Selectivity Form Code System 

 
Codes representing the form of the description of the selectivity of an expression, either conjunctive or disjunctive. 

This Code system is referenced in the definition of the following value sets:

* [Selectivity Form Value Set](ValueSet-selectivity-form.md)

-------

 [Description of the above table(s)](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#terminology). 



## Resource Content

```json
{
  "resourceType" : "CodeSystem",
  "id" : "selectivity-form",
  "meta" : {
    "profile" : ["http://hl7.org/fhir/StructureDefinition/shareablecodesystem"]
  },
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability",
    "valueCode" : "shareable"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability",
    "valueCode" : "computable"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability",
    "valueCode" : "publishable"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel",
    "valueCode" : "structured"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "trial-use"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 1
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "cds"
  }],
  "url" : "http://hl7.org/fhir/uv/cql/CodeSystem/selectivity-form",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.4.642.40.37.16.5"
  }],
  "version" : "3.0.0-ballot",
  "name" : "SelectivityForm",
  "title" : "Selectivity Form Code System",
  "status" : "active",
  "experimental" : false,
  "date" : "2026-04-24",
  "publisher" : "HL7 International / Clinical Decision Support",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/dss"
    }]
  }],
  "description" : "Codes representing the form of the description of the selectivity of an expression, either conjunctive or disjunctive.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "001",
      "display" : "World"
    }]
  }],
  "caseSensitive" : true,
  "valueSet" : "http://hl7.org/fhir/uv/cql/ValueSet/selectivity-form",
  "content" : "complete",
  "concept" : [{
    "code" : "total",
    "display" : "Total",
    "definition" : "Indicates the query selectivity completely covers the criteria in the query (i.e. the query is in CNF/DNF, and all terms are sargeable)."
  },
  {
    "code" : "conjunctive",
    "display" : "Conjunctive",
    "definition" : "Indicates the query selectivity represents criteria in Conjunctive Normal Form (CNF) (i.e. a conjunction of disjunctions)."
  },
  {
    "code" : "disjunctive",
    "display" : "Disjunctive",
    "definition" : "Indicates the query selectivity represents criteria in Disjunctive Normal Form (DNF) (i.e. a disjunction of conjunctions)."
  }]
}

```
