Clinical Document Architecture, published by Health Level 7. This guide is not an authorized publication; it is the continuous build for version 2.0.1-sd built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/CDA-core-sd/ and changes regularly. See the Directory of published versions

• Content
• Detailed Descriptions
• Mappings
• XML
• JSON

Logical Model: ST: CharacterString (V3 Data Type)

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:

• Derived from this Logical Model: ADXP: CharacterString (V3 Data Type), ENXP: Entity Name Part (V3 Data Type) and SC: CharacterStringWithCode (V3 Data Type)
• Use this Logical Model: ClinicalDocument (CDA Class), Criterion (CDA Class), Material (CDA Class), Observation (CDA Class)... Show 2 more, ObservationRange (CDA Class) and Section (CDA Class)

You can also check for usages in the FHIR IG Statistics

Formal Views of Template Content

Description of Template, Differentials, Snapshots and how the different presentations work.

• Key Elements Table
• Differential Table
• Snapshot Table
• Statistics/References
• All

This structure is derived from ANY

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
ST	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
@representation		0..1	cs	Fixed Value: TXT
@mediaType		0..1	cs	Fixed Value: text/plain
@language		0..1	cs
xmlText		0..1	st	Allows for mixed text content
Documentation for this format

Constraints

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: Bindings Constraints Obligations
ST	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
(Choice of one)		1..1
@nullFlavor		0..1	cs	Binding: CDANullFlavor (required)
xmlText		0..1	st	Allows for mixed text content
@representation		0..1	cs	Fixed Value: TXT
@mediaType		0..1	cs	Fixed Value: text/plain
@language		0..1	cs
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
ST.nullFlavor	required	CDANullFlavor http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor From this IG

Constraints

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: Bindings Constraints Obligations
ST	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
(Choice of one)		1..1
@nullFlavor		0..1	cs	Binding: CDANullFlavor (required)
xmlText		0..1	st	Allows for mixed text content
@representation		0..1	cs	Fixed Value: TXT
@mediaType		0..1	cs	Fixed Value: text/plain
@language		0..1	cs
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
ST.nullFlavor	required	CDANullFlavor http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor From this IG

Constraints

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:

• cs: Coded Simple Value (http://hl7.org/cda/stds/core/StructureDefinition/cs-simple)
• st: Character String (http://hl7.org/cda/stds/core/StructureDefinition/st-simple)

Differential View

This structure is derived from ANY

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
ST	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
@representation		0..1	cs	Fixed Value: TXT
@mediaType		0..1	cs	Fixed Value: text/plain
@language		0..1	cs
xmlText		0..1	st	Allows for mixed text content
Documentation for this format

Constraints

Id	Grade	Path(s)	Details	Requirements
text-null	error	ST	xmlText and nullFlavor are mutually exclusive (one must be present) : (xmlText | nullFlavor).count() = 1

Key Elements View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
ST	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
(Choice of one)		1..1
@nullFlavor		0..1	cs	Binding: CDANullFlavor (required)
xmlText		0..1	st	Allows for mixed text content
@representation		0..1	cs	Fixed Value: TXT
@mediaType		0..1	cs	Fixed Value: text/plain
@language		0..1	cs
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
ST.nullFlavor	required	CDANullFlavor http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor From this IG

Constraints

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: Bindings Constraints Obligations
ST	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
(Choice of one)		1..1
@nullFlavor		0..1	cs	Binding: CDANullFlavor (required)
xmlText		0..1	st	Allows for mixed text content
@representation		0..1	cs	Fixed Value: TXT
@mediaType		0..1	cs	Fixed Value: text/plain
@language		0..1	cs
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
ST.nullFlavor	required	CDANullFlavor http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor From this IG

Constraints

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:

• cs: Coded Simple Value (http://hl7.org/cda/stds/core/StructureDefinition/cs-simple)
• st: Character String (http://hl7.org/cda/stds/core/StructureDefinition/st-simple)

Other representations of profile: CSV, Excel