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/ST | Version: 1.0.0 | |||
| Active as of 2025-08-28 | Maturity Level: 1 | Responsible: HL7 | Computable Name: ST | |
The character string data type stands for text data, primarily intended for machine processing (e.g., sorting, querying, indexing, etc.) Used for names, symbols, and formal expressions.
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 | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Elements defined in Ancestors:@nullFlavor Base for all types and resources Logical Container: ClinicalDocument (CDA Class) Constraints: text-null |
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1..1 | |||
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0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]() |
0..1 | st | Allows for mixed text content | |
![]() ![]() |
0..1 | cs | Fixed Value: TXT | |
![]() ![]() |
0..1 | cs | Fixed Value: text/plain | |
![]() ![]() |
0..1 | cs | ||
Documentation for this format | ||||
| Path | Conformance | ValueSet | URI |
| ST.nullFlavor | required | CDANullFlavorhttp://hl7.org/cda/stds/core/ValueSet/CDANullFlavorFrom this IG |
| Id | Grade | Path(s) | Details | Requirements |
| text-null | error | ST | xmlText and nullFlavor are mutually exclusive (one must be present) : (xmlText | nullFlavor).count() = 1 |
This structure is derived from ANY
| Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
|---|---|---|---|---|
![]() |
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Elements defined in Ancestors:@nullFlavor Base for all types and resources Logical Container: ClinicalDocument (CDA Class) Constraints: text-null |
![]() ![]() |
0..1 | cs | Fixed Value: TXT | |
![]() ![]() |
0..1 | cs | Fixed Value: text/plain | |
![]() ![]() |
0..1 | cs | ||
![]() ![]() |
0..1 | st | Allows for mixed text content | |
Documentation for this format | ||||
| Id | Grade | Path(s) | Details | Requirements |
| text-null | error | ST | xmlText and nullFlavor are mutually exclusive (one must be present) : (xmlText | nullFlavor).count() = 1 |
| Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
|---|---|---|---|---|
![]() |
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Elements defined in Ancestors:@nullFlavor Base for all types and resources Logical Container: ClinicalDocument (CDA Class) Constraints: text-null |
![]() ![]() |
1..1 | |||
![]() ![]() ![]() |
0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]() |
0..1 | st | Allows for mixed text content | |
![]() ![]() |
0..1 | cs | Fixed Value: TXT | |
![]() ![]() |
0..1 | cs | Fixed Value: text/plain | |
![]() ![]() |
0..1 | cs | ||
Documentation for this format | ||||
| Path | Conformance | ValueSet | URI |
| ST.nullFlavor | required | CDANullFlavorhttp://hl7.org/cda/stds/core/ValueSet/CDANullFlavorFrom this IG |
| Id | Grade | Path(s) | Details | Requirements |
| text-null | error | ST | xmlText and nullFlavor are mutually exclusive (one must be present) : (xmlText | nullFlavor).count() = 1 |
This structure is derived from ANY
Summary
Fixed: 2 elements
Structures
This structure refers to these other structures:
Maturity: 1
Key Elements View
| Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
|---|---|---|---|---|
![]() |
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Elements defined in Ancestors:@nullFlavor Base for all types and resources Logical Container: ClinicalDocument (CDA Class) Constraints: text-null |
![]() ![]() |
1..1 | |||
![]() ![]() ![]() |
0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]() |
0..1 | st | Allows for mixed text content | |
![]() ![]() |
0..1 | cs | Fixed Value: TXT | |
![]() ![]() |
0..1 | cs | Fixed Value: text/plain | |
![]() ![]() |
0..1 | cs | ||
Documentation for this format | ||||
| Path | Conformance | ValueSet | URI |
| ST.nullFlavor | required | CDANullFlavorhttp://hl7.org/cda/stds/core/ValueSet/CDANullFlavorFrom this IG |
| Id | Grade | Path(s) | Details | Requirements |
| text-null | error | ST | xmlText and nullFlavor are mutually exclusive (one must be present) : (xmlText | nullFlavor).count() = 1 |
Differential View
This structure is derived from ANY
| Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
|---|---|---|---|---|
![]() |
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Elements defined in Ancestors:@nullFlavor Base for all types and resources Logical Container: ClinicalDocument (CDA Class) Constraints: text-null |
![]() ![]() |
0..1 | cs | Fixed Value: TXT | |
![]() ![]() |
0..1 | cs | Fixed Value: text/plain | |
![]() ![]() |
0..1 | cs | ||
![]() ![]() |
0..1 | st | Allows for mixed text content | |
Documentation for this format | ||||
| Id | Grade | Path(s) | Details | Requirements |
| text-null | error | ST | xmlText and nullFlavor are mutually exclusive (one must be present) : (xmlText | nullFlavor).count() = 1 |
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
|---|---|---|---|---|
![]() |
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Elements defined in Ancestors:@nullFlavor Base for all types and resources Logical Container: ClinicalDocument (CDA Class) Constraints: text-null |
![]() ![]() |
1..1 | |||
![]() ![]() ![]() |
0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]() |
0..1 | st | Allows for mixed text content | |
![]() ![]() |
0..1 | cs | Fixed Value: TXT | |
![]() ![]() |
0..1 | cs | Fixed Value: text/plain | |
![]() ![]() |
0..1 | cs | ||
Documentation for this format | ||||
| Path | Conformance | ValueSet | URI |
| ST.nullFlavor | required | CDANullFlavorhttp://hl7.org/cda/stds/core/ValueSet/CDANullFlavorFrom this IG |
| Id | Grade | Path(s) | Details | Requirements |
| text-null | error | ST | xmlText and nullFlavor are mutually exclusive (one must be present) : (xmlText | nullFlavor).count() = 1 |
This structure is derived from ANY
Summary
Fixed: 2 elements
Structures
This structure refers to these other structures:
Maturity: 1