Guide

Maps to related standards

Specific standards

The RDA Registry provides semantic maps from RDA entities and elements to specific related standards.

The maps can be used to support semantic inferencing or entailment to transform a statement that uses an RDA element into a statement that uses a mapped element.

Examples of usage

Statement Notes
subject predicate object
‹ex:1› ‹rdae:P20001› "cartographic dataset" RDA statement; structured description
‹ex:1› ‹lrmer:E341› "cartographic dataset" LRM statement entailed from map
‹ex:1› ‹dct:type› "cartographic dataset" DCT statement entailed from map

Prefixes:

dct: http://purl.org/dc/terms/

lrmer: http://iflastandards.info/ns/lrm/lrmer/

Unconstrained element set

The RDA Registry provides an Unconstrained properties element set that is based on the canonical elements.

The properties have generalized semantics that are not specifically aligned with the entities of the IFLA Library Reference Model (LRM):

  • No domain (or range) is declared.
  • References in labels and definitions of canonical elements to specific types of agent are replaced by the general term "agent" or omitted.
  • References in labels and definitions of canonical elements to work, expression, manifestation, and item entities are replaced by the general term "resource".

Example of deriving an "unconstrained" version of an element

canonical element unconstrained element
rdaw:P10429 rdau:P60476
"has screenwriter person" "has screenwriter"
"Relates a work to a person who is an author of a screenplay, script, or scene." "Relates a resource to an agent who is an author of a screenplay, script, or scene."

The RDA Registry provides a Map from RDA properties to unconstrained properties.

This map can be used to generalize an RDA metadata statement for use in applications that are not based on the LRM.