3.4. Metadata#
Each entity type in CubicWeb has at least the following meta-data attributes and relations:
- eid
entityâs identifier which is unique in an instance. We usually call this identifier eid for historical reason.
- creation_date
Date and time of the creation of the entity.
- modification_date
Date and time of the latest modification of an entity.
- cwuri
Reference URL of the entity, which is not expected to change.
- created_by
Relation to the users who has created the entity
- owned_by
Relation to users whom the entity belongs; usually the creator but not necessary, and it could have multiple owners notably for permission control
- is
Relation to the entity type of which type the entity is.
- is_instance
Relation to the entity types of which type the entity is an instance of.