Da Vinci - Coverage Requirements Discovery
2.2.1 - STU 2.2

Da Vinci - Coverage Requirements Discovery, published by HL7 International / Financial Management. This guide is not an authorized publication; it is the continuous build for version 2.2.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/davinci-crd/ and changes regularly. See the Directory of published versions

## Resource Profile: CRD Base Bundle ( Abstract )

Official URL: http://hl7.org/fhir/us/davinci-crd/StructureDefinition/profile-bundle-base | Version: 2.2.1 | Highlight text changes?
Standards status: Trial-use Active as of 2026-03-26 | Maturity Level: 4 | Computable Name: CRDBaseBundle
Other Identifiers: OID:2.16.840.1.113883.4.642.40.18.42.27

This profile defines the common requirements for all CRD Bundles used as input to CDS Hooks calls.

Usages:

- Derived from this Profile: CRD Bundle of Appointments and CRD Bundle of Request Resources

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

Description Differentials, Snapshots, and other representations.

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

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Bundle | C | 0..* | Bundle | This is an abstract profile. Child profiles: CRDRequestBundle, CRDAppointmentBundle, CRDAppointmentBundle, CRDRequestBundle Contains a collection of resources Constraints: bdl-1, bdl-2, bdl-3, bdl-4, bdl-7, bdl-9, bdl-10, bdl-11, bdl-12
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
type | Σ | 1..1 | code | document | message | transaction | transaction-response | batch | batch-response | history | searchset | collection Binding: BundleType (required): Indicates the purpose of a bundle - how it is intended to be used. Required Pattern: collection
entry | S Σ C | 1..* | BackboneElement | Entry in the bundle - will have a resource or information Constraints: bdl-5, bdl-8 This repeating element order: For bundles of type 'document' and 'message', the first resource is special (must be Composition or MessageHeader respectively). For all bundles, the meaning of the order of entries depends on the bundle type
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
fullUrl | Σ | 1..1 | uri | URI for resource (Absolute URL server address or URI for UUID/OID)
resource | Σ | 1..1 | Resource | A resource in the bundle
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Bundle.type | Base | required | BundleType | 📍4.0.1 | FHIR Std.
Bundle.entry.request.​method | Base | required | HTTPVerb | 📍4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
bdl-1 | error | Bundle | total only when a search or history | `total.empty() or (type = 'searchset') or (type = 'history')`
bdl-2 | error | Bundle | entry.search only when a search | `entry.search.empty() or (type = 'searchset')`
bdl-3 | error | Bundle | entry.request mandatory for batch/transaction/history, otherwise prohibited | `entry.all(request.exists() = (%resource.type = 'batch' or %resource.type = 'transaction' or %resource.type = 'history'))`
bdl-4 | error | Bundle | entry.response mandatory for batch-response/transaction-response/history, otherwise prohibited | `entry.all(response.exists() = (%resource.type = 'batch-response' or %resource.type = 'transaction-response' or %resource.type = 'history'))`
bdl-5 | error | Bundle.entry | must be a resource unless there's a request or response | `resource.exists() or request.exists() or response.exists()`
bdl-7 | error | Bundle | FullUrl must be unique in a bundle, or else entries with the same fullUrl must have different meta.versionId (except in history bundles) | `(type = 'history') or entry.where(fullUrl.exists()).select(fullUrl&resource.meta.versionId).isDistinct()`
bdl-8 | error | Bundle.entry | fullUrl cannot be a version specific reference | `fullUrl.contains('/_history/').not()`
bdl-9 | error | Bundle | A document must have an identifier with a system and a value | `type = 'document' implies (identifier.system.exists() and identifier.value.exists())`
bdl-10 | error | Bundle | A document must have a date | `type = 'document' implies (timestamp.hasValue())`
bdl-11 | error | Bundle | A document must have a Composition as the first resource | `type = 'document' implies entry.first().resource.is(Composition)`
bdl-12 | error | Bundle | A message must have a MessageHeader as the first resource | `type = 'message' implies entry.first().resource.is(MessageHeader)`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Bundle |  | 0..* | Bundle | This is an abstract profile. Child profiles: CRDRequestBundle, CRDAppointmentBundle, CRDAppointmentBundle, CRDRequestBundle Contains a collection of resources
type |  | 1..1 | code | document | message | transaction | transaction-response | batch | batch-response | history | searchset | collection Required Pattern: collection
total |  | 0..0 |  | If search, the total number of matches
entry | S | 1..* | BackboneElement | Entry in the bundle - will have a resource or information
fullUrl |  | 1..1 | uri | URI for resource (Absolute URL server address or URI for UUID/OID)
resource |  | 1..1 | Resource | A resource in the bundle
search |  | 0..0 |  | Search related information
request |  | 0..0 |  | Additional execution information (transaction/batch/history)
response |  | 0..0 |  | Results of execution (transaction/batch/history)
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Bundle | C | 0..* | Bundle | This is an abstract profile. Child profiles: CRDRequestBundle, CRDAppointmentBundle, CRDAppointmentBundle, CRDRequestBundle Contains a collection of resources Constraints: bdl-1, bdl-2, bdl-3, bdl-4, bdl-7, bdl-9, bdl-10, bdl-11, bdl-12
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
identifier | Σ | 0..1 | Identifier | Persistent identifier for the bundle
type | Σ | 1..1 | code | document | message | transaction | transaction-response | batch | batch-response | history | searchset | collection Binding: BundleType (required): Indicates the purpose of a bundle - how it is intended to be used. Required Pattern: collection
timestamp | Σ | 0..1 | instant | When the bundle was assembled
link | Σ | 0..* | BackboneElement | Links related to this Bundle
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
relation | Σ | 1..1 | string | See http://www.iana.org/assignments/link-relations/link-relations.xhtml#link-relations-1
url | Σ | 1..1 | uri | Reference details for the link
entry | S Σ C | 1..* | BackboneElement | Entry in the bundle - will have a resource or information Constraints: bdl-5, bdl-8 This repeating element order: For bundles of type 'document' and 'message', the first resource is special (must be Composition or MessageHeader respectively). For all bundles, the meaning of the order of entries depends on the bundle type
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
link | Σ | 0..* | See link (Bundle) | Links related to this entry
fullUrl | Σ | 1..1 | uri | URI for resource (Absolute URL server address or URI for UUID/OID)
resource | Σ | 1..1 | Resource | A resource in the bundle
signature | Σ | 0..1 | Signature | Digital Signature
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Bundle.language | Base | preferred | Common Languages | 📍4.0.1 | FHIR Std.
Bundle.type | Base | required | BundleType | 📍4.0.1 | FHIR Std.
Bundle.entry.search.​mode | Base | required | SearchEntryMode | 📍4.0.1 | FHIR Std.
Bundle.entry.request.​method | Base | required | HTTPVerb | 📍4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
bdl-1 | error | Bundle | total only when a search or history | `total.empty() or (type = 'searchset') or (type = 'history')`
bdl-2 | error | Bundle | entry.search only when a search | `entry.search.empty() or (type = 'searchset')`
bdl-3 | error | Bundle | entry.request mandatory for batch/transaction/history, otherwise prohibited | `entry.all(request.exists() = (%resource.type = 'batch' or %resource.type = 'transaction' or %resource.type = 'history'))`
bdl-4 | error | Bundle | entry.response mandatory for batch-response/transaction-response/history, otherwise prohibited | `entry.all(response.exists() = (%resource.type = 'batch-response' or %resource.type = 'transaction-response' or %resource.type = 'history'))`
bdl-5 | error | Bundle.entry | must be a resource unless there's a request or response | `resource.exists() or request.exists() or response.exists()`
bdl-7 | error | Bundle | FullUrl must be unique in a bundle, or else entries with the same fullUrl must have different meta.versionId (except in history bundles) | `(type = 'history') or entry.where(fullUrl.exists()).select(fullUrl&resource.meta.versionId).isDistinct()`
bdl-8 | error | Bundle.entry | fullUrl cannot be a version specific reference | `fullUrl.contains('/_history/').not()`
bdl-9 | error | Bundle | A document must have an identifier with a system and a value | `type = 'document' implies (identifier.system.exists() and identifier.value.exists())`
bdl-10 | error | Bundle | A document must have a date | `type = 'document' implies (timestamp.hasValue())`
bdl-11 | error | Bundle | A document must have a Composition as the first resource | `type = 'document' implies entry.first().resource.is(Composition)`
bdl-12 | error | Bundle | A message must have a MessageHeader as the first resource | `type = 'message' implies entry.first().resource.is(MessageHeader)`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Summary

Mandatory: 3 elements
Must-Support: 1 element
Prohibited: 4 elements

Maturity: 4

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Bundle | C | 0..* | Bundle | This is an abstract profile. Child profiles: CRDRequestBundle, CRDAppointmentBundle, CRDAppointmentBundle, CRDRequestBundle Contains a collection of resources Constraints: bdl-1, bdl-2, bdl-3, bdl-4, bdl-7, bdl-9, bdl-10, bdl-11, bdl-12
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
type | Σ | 1..1 | code | document | message | transaction | transaction-response | batch | batch-response | history | searchset | collection Binding: BundleType (required): Indicates the purpose of a bundle - how it is intended to be used. Required Pattern: collection
entry | S Σ C | 1..* | BackboneElement | Entry in the bundle - will have a resource or information Constraints: bdl-5, bdl-8 This repeating element order: For bundles of type 'document' and 'message', the first resource is special (must be Composition or MessageHeader respectively). For all bundles, the meaning of the order of entries depends on the bundle type
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
fullUrl | Σ | 1..1 | uri | URI for resource (Absolute URL server address or URI for UUID/OID)
resource | Σ | 1..1 | Resource | A resource in the bundle
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Bundle.type | Base | required | BundleType | 📍4.0.1 | FHIR Std.
Bundle.entry.request.​method | Base | required | HTTPVerb | 📍4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
bdl-1 | error | Bundle | total only when a search or history | `total.empty() or (type = 'searchset') or (type = 'history')`
bdl-2 | error | Bundle | entry.search only when a search | `entry.search.empty() or (type = 'searchset')`
bdl-3 | error | Bundle | entry.request mandatory for batch/transaction/history, otherwise prohibited | `entry.all(request.exists() = (%resource.type = 'batch' or %resource.type = 'transaction' or %resource.type = 'history'))`
bdl-4 | error | Bundle | entry.response mandatory for batch-response/transaction-response/history, otherwise prohibited | `entry.all(response.exists() = (%resource.type = 'batch-response' or %resource.type = 'transaction-response' or %resource.type = 'history'))`
bdl-5 | error | Bundle.entry | must be a resource unless there's a request or response | `resource.exists() or request.exists() or response.exists()`
bdl-7 | error | Bundle | FullUrl must be unique in a bundle, or else entries with the same fullUrl must have different meta.versionId (except in history bundles) | `(type = 'history') or entry.where(fullUrl.exists()).select(fullUrl&resource.meta.versionId).isDistinct()`
bdl-8 | error | Bundle.entry | fullUrl cannot be a version specific reference | `fullUrl.contains('/_history/').not()`
bdl-9 | error | Bundle | A document must have an identifier with a system and a value | `type = 'document' implies (identifier.system.exists() and identifier.value.exists())`
bdl-10 | error | Bundle | A document must have a date | `type = 'document' implies (timestamp.hasValue())`
bdl-11 | error | Bundle | A document must have a Composition as the first resource | `type = 'document' implies entry.first().resource.is(Composition)`
bdl-12 | error | Bundle | A message must have a MessageHeader as the first resource | `type = 'message' implies entry.first().resource.is(MessageHeader)`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Differential View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Bundle |  | 0..* | Bundle | This is an abstract profile. Child profiles: CRDRequestBundle, CRDAppointmentBundle, CRDAppointmentBundle, CRDRequestBundle Contains a collection of resources
type |  | 1..1 | code | document | message | transaction | transaction-response | batch | batch-response | history | searchset | collection Required Pattern: collection
total |  | 0..0 |  | If search, the total number of matches
entry | S | 1..* | BackboneElement | Entry in the bundle - will have a resource or information
fullUrl |  | 1..1 | uri | URI for resource (Absolute URL server address or URI for UUID/OID)
resource |  | 1..1 | Resource | A resource in the bundle
search |  | 0..0 |  | Search related information
request |  | 0..0 |  | Additional execution information (transaction/batch/history)
response |  | 0..0 |  | Results of execution (transaction/batch/history)
Documentation for this format

Snapshot ViewView

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Bundle | C | 0..* | Bundle | This is an abstract profile. Child profiles: CRDRequestBundle, CRDAppointmentBundle, CRDAppointmentBundle, CRDRequestBundle Contains a collection of resources Constraints: bdl-1, bdl-2, bdl-3, bdl-4, bdl-7, bdl-9, bdl-10, bdl-11, bdl-12
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
identifier | Σ | 0..1 | Identifier | Persistent identifier for the bundle
type | Σ | 1..1 | code | document | message | transaction | transaction-response | batch | batch-response | history | searchset | collection Binding: BundleType (required): Indicates the purpose of a bundle - how it is intended to be used. Required Pattern: collection
timestamp | Σ | 0..1 | instant | When the bundle was assembled
link | Σ | 0..* | BackboneElement | Links related to this Bundle
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
relation | Σ | 1..1 | string | See http://www.iana.org/assignments/link-relations/link-relations.xhtml#link-relations-1
url | Σ | 1..1 | uri | Reference details for the link
entry | S Σ C | 1..* | BackboneElement | Entry in the bundle - will have a resource or information Constraints: bdl-5, bdl-8 This repeating element order: For bundles of type 'document' and 'message', the first resource is special (must be Composition or MessageHeader respectively). For all bundles, the meaning of the order of entries depends on the bundle type
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
link | Σ | 0..* | See link (Bundle) | Links related to this entry
fullUrl | Σ | 1..1 | uri | URI for resource (Absolute URL server address or URI for UUID/OID)
resource | Σ | 1..1 | Resource | A resource in the bundle
signature | Σ | 0..1 | Signature | Digital Signature
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Bundle.language | Base | preferred | Common Languages | 📍4.0.1 | FHIR Std.
Bundle.type | Base | required | BundleType | 📍4.0.1 | FHIR Std.
Bundle.entry.search.​mode | Base | required | SearchEntryMode | 📍4.0.1 | FHIR Std.
Bundle.entry.request.​method | Base | required | HTTPVerb | 📍4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
bdl-1 | error | Bundle | total only when a search or history | `total.empty() or (type = 'searchset') or (type = 'history')`
bdl-2 | error | Bundle | entry.search only when a search | `entry.search.empty() or (type = 'searchset')`
bdl-3 | error | Bundle | entry.request mandatory for batch/transaction/history, otherwise prohibited | `entry.all(request.exists() = (%resource.type = 'batch' or %resource.type = 'transaction' or %resource.type = 'history'))`
bdl-4 | error | Bundle | entry.response mandatory for batch-response/transaction-response/history, otherwise prohibited | `entry.all(response.exists() = (%resource.type = 'batch-response' or %resource.type = 'transaction-response' or %resource.type = 'history'))`
bdl-5 | error | Bundle.entry | must be a resource unless there's a request or response | `resource.exists() or request.exists() or response.exists()`
bdl-7 | error | Bundle | FullUrl must be unique in a bundle, or else entries with the same fullUrl must have different meta.versionId (except in history bundles) | `(type = 'history') or entry.where(fullUrl.exists()).select(fullUrl&resource.meta.versionId).isDistinct()`
bdl-8 | error | Bundle.entry | fullUrl cannot be a version specific reference | `fullUrl.contains('/_history/').not()`
bdl-9 | error | Bundle | A document must have an identifier with a system and a value | `type = 'document' implies (identifier.system.exists() and identifier.value.exists())`
bdl-10 | error | Bundle | A document must have a date | `type = 'document' implies (timestamp.hasValue())`
bdl-11 | error | Bundle | A document must have a Composition as the first resource | `type = 'document' implies entry.first().resource.is(Composition)`
bdl-12 | error | Bundle | A message must have a MessageHeader as the first resource | `type = 'message' implies entry.first().resource.is(MessageHeader)`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Summary

Mandatory: 3 elements
Must-Support: 1 element
Prohibited: 4 elements

Maturity: 4

Other representations of profile: CSV, Excel, Schematron