<status value="active"/> <experimental value="false"/> <date value="2019-11-01T09:29:23+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="The meaning of the hierarchy of concepts in a code system."/> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/codesystem-hierarchy-meaning"/> <content value="complete"/> <concept> <code value="grouped-by"/> <display value="Grouped By"/> <definition value="No particular relationship between the concepts can be assumed, except what can be determined by inspection of the definitions of the elements (possible reasons to use this: importing from a source where this is not defined, or where various parts of the hierarchy have different meanings)."/> </concept> <concept> <code value="is-a"/> <display value="Is-A"/> <definition value="A hierarchy where the child concepts have an IS-A relationship with the parents - that is, all the properties of the parent are also true for its child concepts. Not that is-a is a property of the concepts, so additional subsumption relationships may be defined using properties or the [subsumes](extension-codesystem-subsumes.html) extension."/> </concept> <concept> <code value="part-of"/> <display value="Part Of"/> <definition value="Child elements list the individual parts of a composite whole (e.g. body site)."/> </concept> <concept> <code value="classified-with"/> <display value="Classified With"/> <definition value="Child concepts in the hierarchy may have only one parent, and there is a presumption that the code system is a "closed world" meaning all things must be in the hierarchy. This results in concepts such as "not otherwise classified."."/> </concept> </CodeSystem>

CodeSystemHierarchyMeaning

The meaning of the hierarchy of concepts in a code system.

This code system http://hl7.org/fhir/codesystem-hierarchy-meaning defines the following codes:

Code	Display	Definition
grouped-by	Grouped By	No particular relationship between the concepts can be assumed, except what can be determined by inspection of the definitions of the elements (possible reasons to use this: importing from a source where this is not defined, or where various parts of the hierarchy have different meanings).
is-a	Is-A	A hierarchy where the child concepts have an IS-A relationship with the parents - that is, all the properties of the parent are also true for its child concepts. Not that is-a is a property of the concepts, so additional subsumption relationships may be defined using properties or the [subsumes](extension-codesystem-subsumes.html) extension.
part-of	Part Of	Child elements list the individual parts of a composite whole (e.g. body site).
classified-with	Classified With	Child concepts in the hierarchy may have only one parent, and there is a presumption that the code system is a "closed world" meaning all things must be in the hierarchy. This results in concepts such as "not otherwise classified.".