Using CQL With FHIR
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CodeSystem: Selectivity Form Code System

Official URL: http://hl7.org/fhir/uv/cql/CodeSystem/selectivity-form Version: 3.0.0-ballot
Standards status: Trial-use Maturity Level: 1 Computable Name: SelectivityForm
Other Identifiers: OID:2.16.840.1.113883.4.642.40.37.16.5

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:

This case-sensitive code system http://hl7.org/fhir/uv/cql/CodeSystem/selectivity-form defines the following codes:

CodeDisplayDefinition
total Total Indicates the query selectivity completely covers the criteria in the query (i.e. the query is in CNF/DNF, and all terms are sargeable).
conjunctive Conjunctive Indicates the query selectivity represents criteria in Conjunctive Normal Form (CNF) (i.e. a conjunction of disjunctions).
disjunctive Disjunctive Indicates the query selectivity represents criteria in Disjunctive Normal Form (DNF) (i.e. a disjunction of conjunctions).

Description of the above table(s).