Clinical Document Architecture - Local Development build (v2.0.1-sd-202510-matchbox-patch) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
| Official URL: http://hl7.org/cda/stds/core/StructureDefinition/BL | Version: 2.0.1-sd-202510-matchbox-patch | |||
| Active as of 2025-10-29 | Computable Name: BL | |||
The Boolean type stands for the values of two-valued logic. A Boolean value can be either true or false, or, as any other value may be NULL.
Usages:
You can also check for usages in the FHIR IG Statistics
Description of Template, Differentials, Snapshots and how the different presentations work.
This structure is derived from ANY
| Name | Flags | Card. | Type | Description & Constraints    Filter:  ![]() ![]()  | 
|---|---|---|---|---|
![]()  | 
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Base for all types and resources Elements defined in Ancestors:@nullFlavor Logical Container: ClinicalDocument (CDA Class) Constraints: value-null  | 
![]() ![]()  | 
0..1 | bl | ||
  Documentation for this format | ||||
| Id | Grade | Path(s) | Description | Expression | 
| value-null | error | BL | value and nullFlavor are mutually exclusive (one must be present) | 
      (value | nullFlavor).count() = 1
     | 
  
| Name | Flags | Card. | Type | Description & Constraints    Filter:  ![]() ![]()  | 
|---|---|---|---|---|
![]()  | 
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Base for all types and resources Elements defined in Ancestors:@nullFlavor Logical Container: ClinicalDocument (CDA Class) Constraints: value-null  | 
![]() ![]()  | 
1..1 | |||
![]() ![]() ![]()  | 
0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]()  | 
0..1 | bl | ||
  Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source | 
| BL.nullFlavor | Base | required | CDANullFlavor | 📦2.0.1-sd-202510-matchbox-patch | This IG | 
| Id | Grade | Path(s) | Description | Expression | 
| value-null | error | BL | value and nullFlavor are mutually exclusive (one must be present) | 
      (value | nullFlavor).count() = 1
     | 
  
| Name | Flags | Card. | Type | Description & Constraints    Filter:  ![]() ![]()  | 
|---|---|---|---|---|
![]()  | 
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Base for all types and resources Elements defined in Ancestors:@nullFlavor Logical Container: ClinicalDocument (CDA Class) Constraints: value-null  | 
![]() ![]()  | 
1..1 | |||
![]() ![]() ![]()  | 
0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]()  | 
0..1 | bl | ||
  Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source | 
| BL.nullFlavor | Base | required | CDANullFlavor | 📦2.0.1-sd-202510-matchbox-patch | This IG | 
| Id | Grade | Path(s) | Description | Expression | 
| value-null | error | BL | value and nullFlavor are mutually exclusive (one must be present) | 
      (value | nullFlavor).count() = 1
     | 
  
This structure is derived from ANY
Differential View
This structure is derived from ANY
| Name | Flags | Card. | Type | Description & Constraints    Filter:  ![]() ![]()  | 
|---|---|---|---|---|
![]()  | 
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Base for all types and resources Elements defined in Ancestors:@nullFlavor Logical Container: ClinicalDocument (CDA Class) Constraints: value-null  | 
![]() ![]()  | 
0..1 | bl | ||
  Documentation for this format | ||||
| Id | Grade | Path(s) | Description | Expression | 
| value-null | error | BL | value and nullFlavor are mutually exclusive (one must be present) | 
      (value | nullFlavor).count() = 1
     | 
  
Key Elements View
| Name | Flags | Card. | Type | Description & Constraints    Filter:  ![]() ![]()  | 
|---|---|---|---|---|
![]()  | 
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Base for all types and resources Elements defined in Ancestors:@nullFlavor Logical Container: ClinicalDocument (CDA Class) Constraints: value-null  | 
![]() ![]()  | 
1..1 | |||
![]() ![]() ![]()  | 
0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]()  | 
0..1 | bl | ||
  Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source | 
| BL.nullFlavor | Base | required | CDANullFlavor | 📦2.0.1-sd-202510-matchbox-patch | This IG | 
| Id | Grade | Path(s) | Description | Expression | 
| value-null | error | BL | value and nullFlavor are mutually exclusive (one must be present) | 
      (value | nullFlavor).count() = 1
     | 
  
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints    Filter:  ![]() ![]()  | 
|---|---|---|---|---|
![]()  | 
C | 1..* | ANY | XML Namespace: urn:hl7-org:v3 Base for all types and resources Elements defined in Ancestors:@nullFlavor Logical Container: ClinicalDocument (CDA Class) Constraints: value-null  | 
![]() ![]()  | 
1..1 | |||
![]() ![]() ![]()  | 
0..1 | cs | Binding: CDANullFlavor (required) | |
![]() ![]() ![]()  | 
0..1 | bl | ||
  Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source | 
| BL.nullFlavor | Base | required | CDANullFlavor | 📦2.0.1-sd-202510-matchbox-patch | This IG | 
| Id | Grade | Path(s) | Description | Expression | 
| value-null | error | BL | value and nullFlavor are mutually exclusive (one must be present) | 
      (value | nullFlavor).count() = 1
     | 
  
This structure is derived from ANY