Guide
- IFLA Library Reference Model
- RDA entities
- RDA elements
- RDA values
- Data transformation
- Application profiles
- Customization
- Development history
For a list of prefixes used for compact URIs (curies), see Curie prefixes.
RDA entities
Implementation of LRM
RDA implements all of the IFLA Library Reference Model entities, with some changes:
- Res is replaced by RDA Entity, a sub-class of Res and a super-class of all other RDA entities. This encapsulates the RDA implementation of the LRM and distinguishes RDA from other implementations.
- Collective Agent is divided into two sub-entities that were already used in RDA:
- Corporate Body
- Family
- Time-span is renamed Timespan to avoid problems with hyphens when searching the RDA Toolkit.
There are 13 RDA entities.
Class hierarchy
An RDA entity is represented in the RDA Registry as an RDF class.
RDA classes are identified and described in the RDA Classes element set.
RDF graph of RDA class hierarchy
Map to LRM
The RDA Registry provides a Map from RDA classes to IFLA LRM.
Elements
Each RDA entity is associated with a set of elements that describe characteristics of the entity and relate the entity to other entities.
An RDA element is represented in the RDA Registry as an RDF property.
An RDA entity is associated with an element by being declared as the domain of the element.