Union of http://hl7.org/fhir/us/davinci-cdex/StructureDefinition/cdex-signature and http://hl7.org/fhir/us/davinci-cdex/StructureDefinition/cdex-digital-signature

This is the set of resources that conform to either of the profiles CDex Signature Profile (http://hl7.org/fhir/us/davinci-cdex/StructureDefinition/cdex-signature) and CDex Digital Signature Profile (http://hl7.org/fhir/us/davinci-cdex/StructureDefinition/cdex-digital-signature). E.g. what you have to deal with if you get resources conforming to one of them

Structure

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Signature C0..*left: JWS Digital Signature; right: CDex Bundle and QuestionnaireResponse signature
Constraints: cdex-13
... extension 0..*ExtensionAdditional content defined by implementations
... type SΣ1..*CodingIndication of the reason the entity signed the object(s)
Binding: ?? (preferred): An indication of the reason that an entity signed the object.
... when SΣ1..1instantWhen the signature was created
... who SΣ1..1Reference(US Core Practitioner Profile S | US Core Organization Profile S | US Core PractitionerRole Profile)Organization or practitioner who signed the Bundle
.... extension 0..*ExtensionAdditional content defined by implementations
.... reference SΣ0..1stringLiteral reference, Relative, internal or absolute URL
.... type Σ0..1uriType the reference refers to (e.g. "Patient")
Binding: ?? (extensible): Aa resource (or, for logical models, the URI of the logical model).
.... identifier SΣ0..1IdentifierNPI or US Tax ID
..... extension 0..*ExtensionAdditional content defined by implementations
..... use ?!Σ0..1codeusual | official | temp | secondary | old (If known)
Binding: ?? (required): Identifies the purpose for this identifier, if known .
..... type SΣ0..1CodeableConceptDescription of identifier
Binding: ?? (extensible): A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
..... system SΣ0..1uriThe namespace for the identifier value
Example General: http://www.acme.com/identifiers/patient
..... value SΣ1..1stringThe value that is unique
Example General: 123456
..... period Σ0..1PeriodTime period when id is/was valid for use
..... assigner Σ0..1Reference(Organization)Organization that issued id (may be just text)
.... display SΣ0..1stringText alternative for the resource
... onBehalfOf Σ0..1Reference(Practitioner | PractitionerRole | RelatedPerson | Patient | Device | Organization)The party represented
... targetFormat S0..1codeleft: The technical format of the signed resources; right: Canonicalization method
Binding: ?? (required): The mime type of an attachment. Any valid mime type is allowed.
... sigFormat S0..1codeleft: The technical format of the signature; right: The JWS mime type
Binding: ?? (required): The mime type of an attachment. Any valid mime type is allowed.
... data S1..1base64Binaryleft: base64 encoded JWS-Signature; right: base64 encoded JSON Web Signature (JWS)

doco Documentation for this format