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

Logical Model: Section - Detailed Descriptions

Active as of 2024-12-18

Definitions for the Section logical model.

Guidance on how to interpret the contents of this table can be found here

0. Section
Control1..1
Logical ContainerADHA ClinicalDocument (CDA Class)
ValidationInstance of this type are validated by templateId
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
2. Section.ID
Control0..1
Typeid(xs:ID)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
4. Section.classCode
Control0..1
BindingThe codes SHALL be taken from ActClassRecordOrganizer
(required to http://terminology.hl7.org/ValueSet/v3-ActClassRecordOrganizer)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueDOCSECT
6. Section.moodCode
Control0..1
BindingThe codes SHALL be taken from CDAActMood
(required to http://hl7.org/cda/stds/core/ValueSet/CDAActMood)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueEVN
8. Section.id
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
10. Section.code
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CE
12. Section.title
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/ST
14. Section.text
Control0..1
Typexhtml
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatThis property is represented as CDA Text in the XML.
16. Section.confidentialityCode
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CE
18. Section.languageCode
Control0..1
BindingThe codes SHALL be taken from AllLanguages
(required to http://hl7.org/fhir/ValueSet/all-languages)
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CS
20. Section.subject
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Subject
22. Section.author
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Author
24. Section.informant
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Informant
26. Section.entry
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Entry
28. Section.component
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/InfrastructureRoot
30. Section.component.typeCode
Definition

Drawn from concept domain DocumentSectionType

Control0..1
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueCOMP
32. Section.component.contextConductionInd
Control0..1
Typeboolean(bl: Boolean)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed Valuetrue
34. Section.component.section
Control1..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Section

Guidance on how to interpret the contents of this table can be found here

0. Section
Definition

Defines the basic properties of every data value. This is an abstract type, meaning that no value can be just a data value without belonging to any concrete type. Every concrete type is a specialization of this general abstract DataValue type.


Base definition for all types defined in FHIR type system.

ShortBase for all types and resources
Control10..1*
Is Modifierfalse
Logical ContainerADHA ClinicalDocument (CDA Class)
ValidationInstance of this type are validated by templateId
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
2. Section.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
4. Section.realmCode
Definition

When valued in an instance, this attribute signals the imposition of realm-specific constraints. The value of this attribute identifies the realm in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CS
6. Section.typeId
Definition

When valued in an instance, this attribute signals the imposition of constraints defined in an HL7-specified message type. This might be a common type (also known as CMET in the messaging communication environment), or content included within a wrapper. The value of this attribute provides a unique identifier for the type in question.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
InvariantsII-1: An II instance must have either a root or an nullFlavor. (root.exists() or nullFlavor.exists())
8. Section.typeId.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
10. Section.typeId.assigningAuthorityName
Definition

A human readable name or mnemonic for the assigning authority. The Assigning Authority Name has no computational value. The purpose of a Assigning Authority Name is to assist an unaided human interpreter of an II value to interpret the authority. Note: no automated processing must depend on the assigning authority name to be present in any form.

Control0..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelAssigning Authority Name
12. Section.typeId.displayable
Definition

Specifies if the identifier is intended for human display and data entry (displayable = true) as opposed to pure machine interoperation (displayable = false).

Control0..1
Typeboolean(bl: Boolean)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelDisplayable
14. Section.typeId.root
Definition

Identifies the type as an HL7 Registered model

Control1..1
Typestring(oid: ISO Object Identifier, uuid: DCE Universal Unique Identifier, ruid: HL7 Reserved Identifier Scheme)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelRoot
Fixed Value2.16.840.1.113883.1.3
16. Section.typeId.extension
Definition

A character string as a unique identifier within the scope of the identifier root.

Control1..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExtension
18. Section.templateId
Definition

When valued in an instance, this attribute signals the imposition of a set of template-defined constraints. The value of this attribute provides a unique identifier for the templates in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
20. Section.ID
Control0..1
Typeid(xs:ID)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
22. Section.classCode
Control0..1
BindingThe codes SHALL be taken from ActClassRecordOrganizer
(required to http://terminology.hl7.org/ValueSet/v3-ActClassRecordOrganizer)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueDOCSECT
24. Section.moodCode
Control0..1
BindingThe codes SHALL be taken from CDAActMood
(required to http://hl7.org/cda/stds/core/ValueSet/CDAActMood)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueEVN
26. Section.id
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
28. Section.code
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CE
30. Section.title
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/ST
32. Section.text
Control0..1
Typexhtml
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatThis property is represented as CDA Text in the XML.
34. Section.confidentialityCode
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CE
36. Section.languageCode
Control0..1
BindingThe codes SHALL be taken from AllLanguages
(required to http://hl7.org/fhir/ValueSet/all-languages)
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CS
38. Section.subject
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Subject
40. Section.author
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Author
42. Section.informant
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Informant
44. Section.entry
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Entry
46. Section.component
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/InfrastructureRoot
48. Section.component.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
50. Section.component.realmCode
Definition

When valued in an instance, this attribute signals the imposition of realm-specific constraints. The value of this attribute identifies the realm in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CS
52. Section.component.typeId
Definition

When valued in an instance, this attribute signals the imposition of constraints defined in an HL7-specified message type. This might be a common type (also known as CMET in the messaging communication environment), or content included within a wrapper. The value of this attribute provides a unique identifier for the type in question.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
InvariantsII-1: An II instance must have either a root or an nullFlavor. (root.exists() or nullFlavor.exists())
54. Section.component.typeId.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
56. Section.component.typeId.assigningAuthorityName
Definition

A human readable name or mnemonic for the assigning authority. The Assigning Authority Name has no computational value. The purpose of a Assigning Authority Name is to assist an unaided human interpreter of an II value to interpret the authority. Note: no automated processing must depend on the assigning authority name to be present in any form.

Control0..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelAssigning Authority Name
58. Section.component.typeId.displayable
Definition

Specifies if the identifier is intended for human display and data entry (displayable = true) as opposed to pure machine interoperation (displayable = false).

Control0..1
Typeboolean(bl: Boolean)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelDisplayable
60. Section.component.typeId.root
Definition

Identifies the type as an HL7 Registered model

Control1..1
Typestring(oid: ISO Object Identifier, uuid: DCE Universal Unique Identifier, ruid: HL7 Reserved Identifier Scheme)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelRoot
Fixed Value2.16.840.1.113883.1.3
62. Section.component.typeId.extension
Definition

A character string as a unique identifier within the scope of the identifier root.

Control1..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExtension
64. Section.component.templateId
Definition

When valued in an instance, this attribute signals the imposition of a set of template-defined constraints. The value of this attribute provides a unique identifier for the templates in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
66. Section.component.typeCode
Definition

Drawn from concept domain DocumentSectionType

Control0..1
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueCOMP
68. Section.component.contextConductionInd
Control0..1
Typeboolean(bl: Boolean)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed Valuetrue
70. Section.component.section
Control1..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Section

Guidance on how to interpret the contents of this table can be found here

0. Section
Definition

Defines the basic properties of every data value. This is an abstract type, meaning that no value can be just a data value without belonging to any concrete type. Every concrete type is a specialization of this general abstract DataValue type.

ShortBase for all types and resources
Control1..1
Is Modifierfalse
Logical ContainerADHA ClinicalDocument (CDA Class)
ValidationInstance of this type are validated by templateId
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
2. Section.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
4. Section.realmCode
Definition

When valued in an instance, this attribute signals the imposition of realm-specific constraints. The value of this attribute identifies the realm in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CS
6. Section.typeId
Definition

When valued in an instance, this attribute signals the imposition of constraints defined in an HL7-specified message type. This might be a common type (also known as CMET in the messaging communication environment), or content included within a wrapper. The value of this attribute provides a unique identifier for the type in question.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
InvariantsII-1: An II instance must have either a root or an nullFlavor. (root.exists() or nullFlavor.exists())
8. Section.typeId.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
10. Section.typeId.assigningAuthorityName
Definition

A human readable name or mnemonic for the assigning authority. The Assigning Authority Name has no computational value. The purpose of a Assigning Authority Name is to assist an unaided human interpreter of an II value to interpret the authority. Note: no automated processing must depend on the assigning authority name to be present in any form.

Control0..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelAssigning Authority Name
12. Section.typeId.displayable
Definition

Specifies if the identifier is intended for human display and data entry (displayable = true) as opposed to pure machine interoperation (displayable = false).

Control0..1
Typeboolean(bl: Boolean)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelDisplayable
14. Section.typeId.root
Definition

Identifies the type as an HL7 Registered model

Control1..1
Typestring(oid: ISO Object Identifier, uuid: DCE Universal Unique Identifier, ruid: HL7 Reserved Identifier Scheme)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelRoot
Fixed Value2.16.840.1.113883.1.3
16. Section.typeId.extension
Definition

A character string as a unique identifier within the scope of the identifier root.

Control1..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExtension
18. Section.templateId
Definition

When valued in an instance, this attribute signals the imposition of a set of template-defined constraints. The value of this attribute provides a unique identifier for the templates in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
20. Section.ID
Control0..1
Typeid(xs:ID)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
22. Section.classCode
Control0..1
BindingThe codes SHALL be taken from ActClassRecordOrganizer
(required to http://terminology.hl7.org/ValueSet/v3-ActClassRecordOrganizer)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueDOCSECT
24. Section.moodCode
Control0..1
BindingThe codes SHALL be taken from CDAActMood
(required to http://hl7.org/cda/stds/core/ValueSet/CDAActMood)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueEVN
26. Section.id
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
28. Section.code
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CE
30. Section.title
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/ST
32. Section.text
Control0..1
Typexhtml
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatThis property is represented as CDA Text in the XML.
34. Section.confidentialityCode
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CE
36. Section.languageCode
Control0..1
BindingThe codes SHALL be taken from AllLanguages
(required to http://hl7.org/fhir/ValueSet/all-languages)
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CS
38. Section.subject
Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Subject
40. Section.author
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Author
42. Section.informant
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Informant
44. Section.entry
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Entry
46. Section.component
Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/InfrastructureRoot
48. Section.component.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
50. Section.component.realmCode
Definition

When valued in an instance, this attribute signals the imposition of realm-specific constraints. The value of this attribute identifies the realm in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/CS
52. Section.component.typeId
Definition

When valued in an instance, this attribute signals the imposition of constraints defined in an HL7-specified message type. This might be a common type (also known as CMET in the messaging communication environment), or content included within a wrapper. The value of this attribute provides a unique identifier for the type in question.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
InvariantsII-1: An II instance must have either a root or an nullFlavor. (root.exists() or nullFlavor.exists())
54. Section.component.typeId.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
56. Section.component.typeId.assigningAuthorityName
Definition

A human readable name or mnemonic for the assigning authority. The Assigning Authority Name has no computational value. The purpose of a Assigning Authority Name is to assist an unaided human interpreter of an II value to interpret the authority. Note: no automated processing must depend on the assigning authority name to be present in any form.

Control0..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelAssigning Authority Name
58. Section.component.typeId.displayable
Definition

Specifies if the identifier is intended for human display and data entry (displayable = true) as opposed to pure machine interoperation (displayable = false).

Control0..1
Typeboolean(bl: Boolean)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelDisplayable
60. Section.component.typeId.root
Definition

Identifies the type as an HL7 Registered model

Control1..1
Typestring(oid: ISO Object Identifier, uuid: DCE Universal Unique Identifier, ruid: HL7 Reserved Identifier Scheme)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelRoot
Fixed Value2.16.840.1.113883.1.3
62. Section.component.typeId.extension
Definition

A character string as a unique identifier within the scope of the identifier root.

Control1..1
Typestring(st: Character String)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExtension
64. Section.component.templateId
Definition

When valued in an instance, this attribute signals the imposition of a set of template-defined constraints. The value of this attribute provides a unique identifier for the templates in question

Control0..*
Typehttp://hl7.org/cda/stds/core/StructureDefinition/II
66. Section.component.typeCode
Definition

Drawn from concept domain DocumentSectionType

Control0..1
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed ValueCOMP
68. Section.component.contextConductionInd
Control0..1
Typeboolean(bl: Boolean)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Fixed Valuetrue
70. Section.component.section
Control1..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/Section