- IFLA Library Reference Model
- RDA entities
- RDA elements
- RDA values
- Data transformation
- Application profiles
- Development history
For a list of prefixes used for compact URIs (curies), see Curie prefixes.
IFLA Library Reference Model
RDA is an implementation of the IFLA Library Reference Model (LRM).
The LRM is a high-level conceptual reference model developed within an entity-relationship modelling framework by the International Federation of Library Associations and Institutions (IFLA).
The functional scope of the model is taken from a set of tasks that are defined from the point of view and needs of the end-user of library and cultural heritage resources:
- Find: To bring together information about one or more resources of interest by searching on any relevant criteria.
- Identify: To clearly understand the nature of the resources found and to distinguish between similar resources.
- Select: To determine the suitability of the resources found, and to be enabled to either accept or reject specific resources.
- Obtain: To access the content of the resource.
- Explore: To discover resources using the relationships between them and thus place the resources in a context.
The entities defined in the LRM are "the key objects of interest to users of library information systems":
- Work (http://iflastandards.info/ns/lrm/lrmer/E2)
- Expression (http://iflastandards.info/ns/lrm/lrmer/E3)
- Manifestation (http://iflastandards.info/ns/lrm/lrmer/E4)
- Item (http://iflastandards.info/ns/lrm/lrmer/E5)
- Agent (http://iflastandards.info/ns/lrm/lrmer/E6)
- Nomen (http://iflastandards.info/ns/lrm/lrmer/E9)
- Place (http://iflastandards.info/ns/lrm/lrmer/E10)
- Time-span (http://iflastandards.info/ns/lrm/lrmer/E11)
The classes representing these entities are disjoint.
The Agent entity is divided into two sub-entities:
- Person (http://iflastandards.info/ns/lrm/lrmer/E7)
- Collective Agent (http://iflastandards.info/ns/lrm/lrmer/E8)
The classes representing these sub-entities are disjoint.
The Agent entity is strictly equivalent to the union of the two sub-entities. That is, an agent is one or more persons.
The LRM uses a super-entity to support class inheritance:
The class representing this entity is a super-class of all other LRM classes.
The LRM namespace is http://iflastandards.info/ns/lrm/lrmer/.