<status value="active"/> <experimental value="false"/> <date value="2021-01-05T10:01:24+11:00"/> <publisher value="HL7 (FHIR Project)"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> <telecom> <system value="email"/> <value value="fhir@lists.hl7.org"/> </telecom> </contact> <description value="Logical grouping of characteristics."/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/characteristic-combination"/> <content value="complete"/> <concept> <code value="all-of"/> <display value="All of"/> <definition value="Combine characteristics with AND."/> </concept> <concept> <code value="any-of"/> <display value="Any of"/> <definition value="Combine characteristics with OR."/> </concept> <concept> <code value="at-least"/> <display value="At least"/> <definition value="Meet at least the threshold number of characteristics for definition."/> </concept> <concept> <code value="at-most"/> <display value="At most"/> <definition value="Meet at most the threshold number of characteristics for definition."/> </concept> <concept> <code value="statistical"/> <display value="Statistical"/> <definition value="Combine characteristics statistically. Use method to specify the statistical method."/> </concept> <concept> <code value="net-effect"/> <display value="Net effect"/> <definition value="Combine characteristics by addition of benefits and subtraction of harms."/> </concept> <concept> <code value="dataset"/> <display value="Dataset"/> <definition value="Combine characteristics as a collection used as the dataset."/> </concept> </CodeSystem>

This code system http://hl7.org/fhir/characteristic-combination defines the following codes:

Code	Display	Definition
all-of	All of	Combine characteristics with AND.
any-of	Any of	Combine characteristics with OR.
at-least	At least	Meet at least the threshold number of characteristics for definition.
at-most	At most	Meet at most the threshold number of characteristics for definition.
statistical	Statistical	Combine characteristics statistically. Use method to specify the statistical method.
net-effect	Net effect	Combine characteristics by addition of benefits and subtraction of harms.
dataset	Dataset	Combine characteristics as a collection used as the dataset.