What is a NamingSystem?
A FHIR Naming System is a URL that acts as a well known "name" for the type of another concept, such as an NHS Number (an identifier) or a SNOMED CT code (terminology).
The name is a machine readable unique string for the scheme of an identifier or code system. When a concept is used in FHIR, such as an identifier in a Patient resource, there needs to be a way to show that it is from the set of NHS Numbers and not some other type of identifier. This concept type is a URL, that acts as a name, and it is used in
coding.system. FHIR Naming System URLs are equivalent to OIDs used in earlier versions of HL7. OIDs can still be used but are deprecated for use in FHIR.
This guide is a catalogue of the UK naming URLs. Each name entry is held in a FHIR NamingSystem resource.These resources are only needed as documentation within this catalogue. It is only the naming URL itself that is used in actual FHIR data. Software systems only need to use the correct URL, and don’t need to directly deal with the NamingSystem resources.
Naming System Index Tables
The index tables list the following information which is explained below:
||A human readable name for the naming system
||A URL that is carried in the
coding.system element for NamingSystems of type terminology or
identifier.system for Namingsystems of type identifier within a FHIR instance used for data exchange
||The description of the naming system
||The status of the naming system
- active - a naming system that is still actively maintained
- retired - a naming system that is no longer maintained, however is still useable with a FHIR instance for data exchange. For example, for historic information.
||The type of naming system which MUST be a value from:
This code system http://hl7.org/fhir/namingsystem-type defines the following codes:
|codesystem||Code System||The naming system is used to define concepts and symbols to represent those concepts; e.g. UCUM, LOINC, NDC code, local lab codes, etc.|
|identifier||Identifier||The naming system is used to manage identifiers (e.g. license numbers, order numbers, etc.).|
|root||Root||The naming system is used as the root for other identifiers and naming systems.|
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Copyright © 2021+ HL7 UK Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. HL7® FHIR® standard Copyright © 2011+ HL7 The HL7® FHIR® standard is used under the FHIR license. You may obtain a copy of the FHIR license at https://www.hl7.org/fhir/license.html.
Developed and authored by UK Core Development Team and published by HL7 UK.