Clinical Document Architecture with Australian Schema, published by Australian Digital Health Agency. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/AuDigitalHealth/cda-au-schema/ and changes regularly. See the Directory of published versions
Official URL: http://hl7.org/cda/stds/core/StructureDefinition/uid | Version: 1.0.0 | |||
Active as of 2025-08-28 | Maturity Level: 1 | Responsible: HL7 | Computable Name: uid |
A unique identifier string is a character string which identifies an object in a globally unique and timeless manner. The allowable formats and values and procedures of this data type are strictly controlled by HL7. At this time, user-assigned identifiers may be certain character representations of ISO Object Identifiers (OID) and DCE Universally Unique Identifiers (UUID). HL7 also reserves the right to assign other forms of UIDs (RUID), such as mnemonic identifiers for code systems.
Usages:
You can also check for usages in the FHIR IG Statistics
Description of Profiles, Differentials, Snapshots and how the different presentations work.
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
---|---|---|---|---|
![]() ![]() |
C | 0..* | string | Primitive Type string Constraints: uid-pattern |
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Id | Grade | Path(s) | Details | Requirements |
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
uid-pattern | error | string | Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens) : matches('^([0-2](\\.(0|[1-9][0-9]*))+)|([0-9A-Za-z]{8}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{12})|([A-Za-z][A-Za-z0-9\\-]*)$') |
This structure is derived from string
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
---|---|---|---|---|
![]() ![]() |
C | 0..* | string | Primitive Type string Constraints: uid-pattern |
![]() ![]() ![]() |
0..0 | |||
![]() ![]() ![]() |
0..0 | |||
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Id | Grade | Path(s) | Details | Requirements |
uid-pattern | error | string | Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens) : matches('^([0-2](\\.(0|[1-9][0-9]*))+)|([0-9A-Za-z]{8}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{12})|([A-Za-z][A-Za-z0-9\\-]*)$') |
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
---|---|---|---|---|
![]() ![]() |
C | 0..* | string | Primitive Type string Constraints: uid-pattern |
![]() ![]() ![]() |
0..1 | string | Primitive value for string Max Length:1048576 | |
![]() |
Id | Grade | Path(s) | Details | Requirements |
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
uid-pattern | error | string | Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens) : matches('^([0-2](\\.(0|[1-9][0-9]*))+)|([0-9A-Za-z]{8}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{12})|([A-Za-z][A-Za-z0-9\\-]*)$') |
Key Elements View
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
---|---|---|---|---|
![]() ![]() |
C | 0..* | string | Primitive Type string Constraints: uid-pattern |
![]() |
Id | Grade | Path(s) | Details | Requirements |
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
uid-pattern | error | string | Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens) : matches('^([0-2](\\.(0|[1-9][0-9]*))+)|([0-9A-Za-z]{8}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{12})|([A-Za-z][A-Za-z0-9\\-]*)$') |
Differential View
This structure is derived from string
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
---|---|---|---|---|
![]() ![]() |
C | 0..* | string | Primitive Type string Constraints: uid-pattern |
![]() ![]() ![]() |
0..0 | |||
![]() ![]() ![]() |
0..0 | |||
![]() |
Id | Grade | Path(s) | Details | Requirements |
uid-pattern | error | string | Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens) : matches('^([0-2](\\.(0|[1-9][0-9]*))+)|([0-9A-Za-z]{8}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{12})|([A-Za-z][A-Za-z0-9\\-]*)$') |
Snapshot View
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
---|---|---|---|---|
![]() ![]() |
C | 0..* | string | Primitive Type string Constraints: uid-pattern |
![]() ![]() ![]() |
0..1 | string | Primitive value for string Max Length:1048576 | |
![]() |
Id | Grade | Path(s) | Details | Requirements |
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
uid-pattern | error | string | Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens) : matches('^([0-2](\\.(0|[1-9][0-9]*))+)|([0-9A-Za-z]{8}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{12})|([A-Za-z][A-Za-z0-9\\-]*)$') |
Other representations of profile: CSV, Excel, Schematron