Provenance of a resource is a record that describes entities and processes involved in producing and delivering or otherwise influencing that resource. Provenance provides a critical foundation for assessing authenticity, enabling trust, and allowing reproducibility. Provenance assertions are a form of contextual metadata and can themselves become important records with their own provenance. Provenance statement indicates clinical significance in terms of confidence in authenticity, reliability, and trustworthiness, integrity, and stage in lifecycle (e.g., Document Completion - has the artifact been legally authenticated), all of which may impact Security, Privacy, and Trust policies.

Some parties may be duplicated between the target resource and its provenance. For instance, the prescriber is usually (but not always) the author of the prescription resource. This resource is defined with close consideration for W3C Provenance.

The Reference(s) that were generated or updated by the activity described in this resource. A provenance can point to more than one target if multiple resources were created/updated by the same activity.

Target references are usually version specific, but may not be, if a version has not been assigned or if the provenance information is part of the set of resources being maintained (i.e. a document). When using the RESTful API, the identity of the resource may not be known (especially not the version specific one); the client may either submit the resource first, and then the provenance, or it may submit both using a single transaction. See the notes on transaction for further discussion.

The period during which the activity occurred.

The period can be a little arbitrary; where possible, the time should correspond to human assessment of the activity time.

The instant of time at which the activity was recorded.

This can be a little different from the time stamp on the resource if there is a delay between recording the event and updating the provenance and target resource.

The reason that the activity was taking place.

Where the activity occurred, if relevant.

Policy or plan the activity was defined by. Typically, a single activity may have multiple applicable policy documents, such as patient consent, guarantor funding, etc.

For example: Where an OAuth token authorizes, the unique identifier from the OAuth token is placed into the policy element Where a policy engine (e.g. XACML) holds policy logic, the unique policy identifier is placed into the policy element.

An agent takes a role in an activity such that the agent can be assigned some degree of responsibility for the activity taking place. An agent can be a person, an organization, software, or other entities that may be ascribed responsibility.

Several agents may be associated (i.e. has some responsibility for an activity) with an activity and vice-versa.

The function of the agent with respect to the activity.

e.g. author | performer | enterer | attester: +.

The type of participation of the agent.

If the type is "Resource" then the resource itself was the participant. If the type is a type of resource, then the entity identified by the resource is the participant.

e.g. Person | Application | Patient | Device +.

Identity of participant as a Resource or uri.

Human-readable description of the participant.

An entity used in this activity.

How the entity was used during the activity.

The type of the entity. If the entity is a resource, then this is a resource type.

If the type is "resource" then the resource itself was the participant. If the type is a type of resource, then the entity identified by the resource is the participant.

Identity of the Entity used. May be a logical or physical uri and maybe absolute or relative.

identity may be a reference to a resource or to something else, depending on the type.

Human-readable description of the entity.

The entity is attributed to an agent to express the agent's responsibility for that entity, possibly along with other agents. This description can be understood as shorthand for saying that the agent was responsible for the activity which generated the entity.

A digital signature on the target Reference(s). The signer should match a Provenance.agent. The purpose of the signature is indicated.