HL7 Terminology (THO)
4.0.0 - Publication International flag

This page is part of the HL7 Terminology (v4.0.0: Release) based on FHIR R4. The current version which supercedes this version is 5.2.0. For a full list of available versions, see the Directory of published versions

ValueSet: URLScheme

Official URL: http://terminology.hl7.org/ValueSet/v3-URLScheme Version: 2.0.0
Active as of 2014-03-26 Computable Name: URLScheme
Other Identifiers: : urn:oid:2.16.840.1.113883.1.11.14866

A Universal Resource Locator (URL) is a type of telecommunications address specified as Internet standard RFC 1738 [http://www.ietf.org/rfc/rfc1738.txt]. The URL specifies the protocol and the contact point defined by that protocol for the resource.


This value set is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)

Logical Definition (CLD)



This value set contains 14 concepts

Expansion based on Universal Resource Locator Scheme v2.1.0 (CodeSystem)

  cidhttp://terminology.hl7.org/CodeSystem/v3-URLSchemeContent ID

Description: cid: is the most common mechanism used in webservices. A cid: reference points from the SOAP body to other content in the mime package in which the SOAP envelope is wrapped


Host-specific local file names [RCF 1738]. Note that the file scheme works only for local files. There is little use for exchanging local file names between systems, since the receiving system likely will not be able to access the file.


The File Transfer Protocol (FTP) [RFC 1738].

  hl7-atthttp://terminology.hl7.org/CodeSystem/v3-URLSchemeHL7 Attachment

Description: A reference to an HL7 attachment by it's identifier, which takes the form hl7-att:[II.literal], such as hl7-att:


Hypertext Transfer Protocol [RFC 2068].



Electronic mail address [RFC 2368]



Description: Mimimal Lower Layer Protocol. See Transport Specification: MLLP, Release 2 (HL7 V3 Transport specification).


Network File System protocol [RFC 2224]. Some sites use NFS servers to share data files.



A voice telephone number [http://www.ietf.org/rfc/rfc3966.txt and http://www.ietf.org/rfc/rfc2806.txt].


Reference to interactive sessions [RFC 1738]. Some sites, (e.g., laboratories) have TTY based remote query sessions that can be accessed through telnet.



A telephone number served by a fax device [http://www.ietf.org/rfc/rfc3966.txt and http://www.ietf.org/rfc/rfc2806.txt].


A telephone number served by a modem device [http://www.ietf.org/rfc/rfc3966.txt and http://www.ietf.org/rfc/rfc2806.txt].


Description: A telephone number served by a fax device [http://www.ietf.org/rfc/rfc3966.txt and http://www.ietf.org/rfc/rfc2806.txt]

  x-text-telhttp://terminology.hl7.org/CodeSystem/v3-URLSchemeText Telephone

Description: A text telephone - a telephone which is designed for use by the hearing-impaired


  • x-text-fax is required to replace fax, since this has been deprecated by W3C.
  • hl7-att is associated with a series of rules that must be followed. These rules are documented in Datatypes R2
  • This domain is external and extensible, so documenting this simply clarifies consistent usage for these use cases.

Explanation of the columns that may appear on this page:

Level A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies
System The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code The code (used as the code in the resource instance)
Display The 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
Definition An explanation of the meaning of the concept
Comments Additional notes about how to use the code


2020-05-06reviseTed KleinVocabulary WGMigrated to the UTG maintenance environment and publishing tooling.
2014-03-26reviseVocabulary (Woody Beeler) (no record of original request)2014T1_2014-03-26_001283 (RIM release ID)Lock all vaue sets untouched since 2014-03-26 to trackingId 2014T1_2014_03_26