HL7 Terminology (THO)
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This page is part of the HL7 Terminology (v5.5.0: Release) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

CodeSystem: MdfHmdRowType

Official URL: http://terminology.hl7.org/CodeSystem/v3-MdfHmdRowType Version: 2.0.1
Retired as of 2019-03-20 Responsible: Health Level 7 Computable Name: MdfHmdRowType
Other Identifiers: urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#urn:oid:2.16.840.1.113883.5.76

The row type codes for the tabular representation of a Hierarchical Message Description.

Deprecation Comment: Deprecated as per 11/2008 Harmonization cleanup; internal and obsolete HL7 usage, no longer used.

This Code system is referenced in the content logical definition of the following value sets:

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


This code system defines the following properties for its concepts

SpecializesCodingThe child code is a more narrow version of the concept represented by the parent code. I.e. Every child concept is also a valid parent concept. Used to allow determination of subsumption. Must be transitive, irreflexive, antisymmetric.
GeneralizesCodingInverse of Specializes. Only included as a derived relationship.
internalIdhttp://terminology.hl7.org/CodeSystem/utg-concept-properties#v3-internal-idcodeThe internal identifier for the concept in the HL7 Access database repository.
statushttp://hl7.org/fhir/concept-properties#statuscodeDesignation of a concept's state. Normally is not populated unless the state is retired.


This case-sensitive code system http://terminology.hl7.org/CodeSystem/v3-MdfHmdRowType defines the following codes in a Is-A heirarchy:

assoc Association RowIdentifies an association leading from the "class" (or association) that is most directly above this row10072active
attr Attribute RowIdentifies an attribute of the "class" (or association) that is most directly above this row.10073active
class HMD root classIdentifies "class" in the HMD. There is only one class entry in a Hierarchical Message Definition. This is the root class for the message.10071active
hmd HMD identifierAlways the first row of the table, identifies the particular Hierarchical Message Definition in the nomenclature of the HL7 Repository.10070active
item Collection Item RowIdentifies a message element that represents one of whatever is repeated in a collection10074active
stc Subtype constraintThis row corresponds to a subcomponent of the row above; it would not normally be included in an HMD, but it is included in order to be able to state a constraint on the subtype. This is explained in


2022-07-22reviseTSMGJessica BotaAdd default value of TRUE for code systems missing caseSensitive element unless otherwise specified; UP-322
2020-10-20deprecateVocabulary WGTed KleindeprecationEffectiveVersion=679-20081229 This Code System was deprecated (retired) as of the Vocabulary Model version shown.
2020-05-06reviseVocabulary WGTed KleinMigrated to the UTG maintenance environment and publishing tooling.