FHIR Extensions Pack
5.1.0 - 5.1.0 (April 2024) International flag

This page is part of the FHIR Core Extensions Registry (v5.1.0: Release 5.1) based on FHIR (HL7® FHIR® Standard) v5.0.0. 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: Type Characteristic Codes System

Official URL: http://hl7.org/fhir/type-characteristics-code Version: 5.1.0
Standards status: Trial-use Maturity Level: 2 Computable Name: TypeCharacteristicCodes
Other Identifiers: OID:2.16.840.1.113883.4.642.4.1901

Type Characteristic Codes

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

Changes since version 1.0.0:

  • The resource metadata has changed (title)
  • The list of codes defined by the code system has changed

    • This case-sensitive code system http://hl7.org/fhir/type-characteristics-code defines the following codes in a Is-A hierarchy:

    LvlCodeDisplayDefinition
    1 has-target Has Target The type is reference to external content else where that can have a type. This is associated with the use of ElementDefinition.type.targetProfile
    1 has-range Has Range The type has a value domain that is a range, and can be associated with allowable min/max values on it's ElementDefinitions
    2   is-continuous Is Continuous The type is a continuous distribution. These types have issues associated with precision and equality, and can have a specified number of max decimal places (via an extension)
    1 has-length Has Length The type has variable length and be constrained by it's length. In principle, any type can be constrained by the number of characters to represent it, but this is not meaningful for numbers or attachments
    1 has-size Has Size The type can be constrained by the number of bytes it takes to represent the content. This is usually applied to content that is compressed or interpreted, and there's no fixed relationship between the number of bytes of content, and the number of characters it represents
    1 can-bind Can Bind The type can be bound to a terminology. Note that a classic binding has system|version|code|display, but not all bindable types carry all four of these, and how they are bound varies, so an additional extension is required to enable tools to work with this content
    1 has-units Has Units The content has units of measure (UCUM, by implication) and it may be useful to constrain the units by some valueset
    1 do-translations Do Translations The content is uncontrolled human readable text that may make sense to translate
    icon Added:1 can-be-target Can Be Target The content has an identify and can be persisted with an appropriate life cycle such that it can be the target of a reference from a resource or another logical model