Release 4B Snapshot #1

This page is part of the FHIR Specification v4.3.0-snapshot1: R4B Snapshot to support the Jan 2022 Connectathon. About the R4B version of FHIR. The current officially released version is 4.3.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4 R3

4.3.14.225 Code System http://hl7.org/fhir/filter-operator

Vocabulary Work Group Maturity Level: NNormative (from v4.0.0) Use Context: Any
This page has been approved as part of an ANSI standard. See the Conformance Package for further details.

This is a code system defined by the FHIR project.

Summary

Defining URL:http://hl7.org/fhir/filter-operator
Version:4.3.0-snapshot1
Name:FilterOperator
Title:FilterOperator
Definition:

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

Committee:Vocabulary Work Group
OID:2.16.840.1.113883.4.642.4.479 (for OID based terminology systems)
Source ResourceXML / JSON

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.)

4.3.14.225.1 Content

4.3.14.225.2 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:

Code Display Definition Comments
= Equals The specified property of the code equals the provided value.
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-of
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 reasons
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.
regex Regular Expression The specified property of the code matches the regex specified in the provided value.
in In Set The specified property of the code is in the set of codes or concepts specified in the provided value (comma separated list).
not-in Not in Set The specified property of the code is not in the set of codes or concepts specified in the provided value (comma separated list).
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 exclude
exists Exists The 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).

 

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