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4.3.2.216 CodeSystem http://hl7.org/fhir/filter-operator

Vocabulary icon Work Group Maturity Level: NNormative (from v4.0.0) Use Context: Any

This is a code system defined by the FHIR project.

Summary

Defining URL:http://hl7.org/fhir/filter-operator
Version:5.0.0-cibuild
Name:FilterOperator
Title:FilterOperator
Status:active
Definition:

The kind of operation to perform as a part of a property based filter.

Committee:Vocabulary icon Work Group
OID:2.16.840.1.113883.4.642.4.479 (for OID based terminology systems)
Flags:CaseSensitive, Complete
All codes ValueSet:FilterOperator

This Code system is used in the following value sets:

  • ValueSet: FilterOperator (The kind of operation to perform as a part of a property based filter.)

This code system http://hl7.org/fhir/filter-operator defines the following codes:

CodeDisplayDefinitionCommentsCopy
= EqualsThe specified property of the code equals the provided value.btn btn
is-a Is A (by subsumption)Includes all concept ids that have a transitive is-a relationship with the concept Id provided as the value, including the provided concept itself (include descendant codes and self).The definition of is-a is that all the properties of the value are true for the specified property of the code, which means that a code has an is-a relationship with itself. To exclude the root code, use descendent-ofbtn btn
descendent-of Descendent Of (by subsumption)Includes all concept ids that have a transitive is-a relationship with the concept Id provided as the value, excluding the provided concept itself i.e. include descendant codes only).The definition of is-a is that all the properties of the value are true for the specified property of the code. Spelling note: "descendant" is a more correct spelling, but the spelling "descendent" is maintained in the code for backwards compatibility reasonsbtn btn
is-not-a Not (Is A) (by subsumption)The specified property of the code does not have an is-a relationship with the provided value.btn btn
regex Regular ExpressionThe specified property of the code matches the regex specified in the provided value.btn btn
in In SetThe specified property of the code is in the set of codes or concepts specified in the provided value (comma separated list).btn btn
not-in Not in SetThe specified property of the code is not in the set of codes or concepts specified in the provided value (comma separated list).btn btn
generalizes Generalizes (by Subsumption)Includes all concept ids that have a transitive is-a relationship from the concept Id provided as the value, including the provided concept itself (i.e. include ancestor codes and self).The definition of is-a is that all the properties of the value are true for the specified property of the code, which means that a code has an is-a relationship with itself. To exclude the root code, add it explicitly to as an excludebtn btn
child-of Child OfOnly concepts with a direct hierarchical relationship to the index code and no other concepts. This does not include the index code in the output.btn btn
descendent-leaf Descendent LeafIncludes concept ids that have a transitive is-a relationship with the concept Id provided as the value, but which do not have any concept ids with transitive is-a relationships with themselves.btn btn
exists ExistsThe specified property of the code has at least one value (if the specified value is true; if the specified value is false, then matches when the specified property of the code has no values).btn btn

 

See the full registry of code systems defined as part of FHIR.


Explanation of the columns that may appear on this page:

LevelA few code lists that FHIR defines are hierarchical - each code is assigned a level. See Code System for further information.
SourceThe source of the definition of the code (when the value set draws in codes defined elsewhere)
CodeThe code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
DisplayThe display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
DefinitionAn explanation of the meaning of the concept
CommentsAdditional notes about how to use the code