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Activity Model

id - unique id for the Activity(string)
name - (string)
description - (string)
used - Array of UsedEntity objects. UsedEntity stores a Reference to an Entity (id & version) and a flag if this entity was "executed" as part of the Activity
etag - optimistic concurrency flag. Changes with each update (string)
createdOn
modifiedOn
createdBy
modifiedBy

Used & GeneratedBy

Used links are stored directly in the Activity model object as an array. We have added an additional flag that marks a used entity as "executed" for display purposes.

wasGeneratedBy links are stored for each version of each Entity. Thus you update the entity with the activity id that generated it. You can ask the entity service which activity generated it, and conversely you can ask the activity service what entity versions were generatedBy a given activity.

Modifications to the current Entity API

The following table describes how provenance effects the current Entity CRUD API:

URL	HTTP Type	Description
/entity?generatedBy={activity id}	POST	Creates a new entity and creates a generatedBy connection to the provided activity. Error Codes 403 - Unauthorized assignment of activity. You must be the creator of the activity to connect it to an entity 404 - If activityId is not found.
/entity/{id}?generatedBy={activity id}	PUT	Updates the entity and creates a generatedBy connection from the current version of the entity to the provided activity. Set activity id to -1 to delete generatedBy connection. Error Codes 403 - Unauthorized assignment of activity. You must be the creator of the activity to connect* it to an entity* 404 - If activityId is not found.
/entity/{id}/version?generatedBy={activityId}	PUT	Creates a new version of a given version-able entity and creates a generatedBy connection to the provided activity. Set activity id to -1 to delete generatedBy connection. Error Codes 403 - Unauthorized assignment of activity. You must be the creator of the activity to connect* it to an entity* 404 - If activityId is not found.
/entity/bundle?generatedBy={activityId}	POST	Creates a new EntityBundle and creates a generatedBy connection to the provided activity. Set activity id to -1 to delete generatedBy connection. Error Codes 403 - Unauthorized assignment of activity. You must be the creator of the activity to connect* it to an entity* 404 - If activityId is not found.
/entity/bundle?generatedBy={activityId}	PUT	Updates an EntityBundle and creates a generatedBy connection to the provided activity. Set activity id to -1 to delete generatedBy connection. Error Codes 403 - Unauthorized assignment of activity. You must be the creator of the activity to connect* it to an entity* 404 - If activityId is not found.

Provenance Additions to the API

Additions to Entity API

The following are new suffixes on the Entity services for Provenance.

URL	HTTP Type	Description
/entity/{id}/generatedBy	GET	Returns the activity that generated the current version of the entity. Error Codes 404 - If the entity is not connected* to an activity.*
/entity/{id}/version/{versionNumber}/generatedBy	GET	Returns the activity that generated the specific version of the entity. Error Codes 404 - If that version of the entity is not connected* to an activity.*
/entity/{id}/generatedBy?generatedBy={activityId}	PUT	Updates the 'generatedBy' information of the current version of the entity, connecting it to 'activityId'. Outside the transaction of entity CRUD. Error Codes 403 - Unauthorized assignment of activity. You must be the creator of the activity to connect* it to an entity* 404 - If activityId is not found.
/entity/{id}/generatedBy	DELETE	Removes the generatedBy connection from the current version of the entity.

Activity API

The following table describes the new methods for performing CRUD on Activity objects.

URL	HTTP Type	Description
/activity	POST	Creates a new activity object.
/activity/{activityId}	GET	Returns the specified activity. Error Codes 403 - Unauthorized access of activity. READ access is permitted if you can see a single entity that was generated by this activity. 404 - If activityId is not found.
/activity/{activityId}	PUT	Updates the specified activity. Error Codes 403 - Unauthorized update of activity. You must be the creator of the activity to modify it. 404 - If activityId is not found.
/activity/{activityId}	DELETE	Error Codes 403 - Unauthorized delete of activity. You must be the creator of the activity to modify it. 404 - If activityId is not found.