FHIR Tooling Extensions IG
1.1.0 - Release 0.2.0 International flag

FHIR Tooling Extensions IG, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 1.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/fhir-tools-ig/ and changes regularly. See the Directory of published versions

Extension: Search Parameter Base Type

Official URL: http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type Version: 1.1.0
Standards status: Informative Active as of 2026-03-04 Maturity Level: 4 Computable Name: SearchParameterBaseType
Other Identifiers: OID:2.16.840.1.113883.4.642.40.1.42.39

Indicates the base type for a search parameter when the actual base type is not a valid resource (e.g. custom resource etc)

Context of Use

Usage info

Usages:

  • This Extension is not used by any profiles in this Implementation Guide

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Base for search parameter when not a resource
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type"
... value[x] 1..1 code Value of extension

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Base for search parameter when not a resource
... id 0..1 id Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type"

doco Documentation for this format

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type code: Indicates the base type for a search parameter when the actual base type is not a valid resource (e.g. custom resource etc)

Maturity: 4

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Base for search parameter when not a resource
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type"
... value[x] 1..1 code Value of extension

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Base for search parameter when not a resource
... id 0..1 id Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type"

doco Documentation for this format

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type code: Indicates the base type for a search parameter when the actual base type is not a valid resource (e.g. custom resource etc)

Maturity: 4

 

Other representations of profile: CSV, Excel, Schematron