Functional Requirements for Subject Authority Data (FRSAD), previously known as Functional Requirements for Subject Authority Records (FRSAR), is a conceptual entity-relationship model developed by the International Federation of Library Associations and Institutions (IFLA)[1] and published in 2010.
It is a continuation of the work done on the FRBR model, detailing how "entities that serve as subjects of intellectual or artistic endeavor"[2] can be related and controlled within the bibliographic universe.
The model is intended to support global sharing and reuse of subject authority data.
FRSAR, if implemented, enables users to perform specific and precise subject searching across multiple systems.
The workgroup conducted two user studies in 2006 and 2007, and based on the results of these studies, four subject authority data user tasks were defined:[3] Find: to find an entity (thema or nomen) or set of entities corresponding to stated criteria Identify: to identify an entity (thema or nomen) based on certain attributes / characteristics Select: to select an entity (thema or nomen) Explore: to explore any relationships between entities (thema or nomen), correlations to other subject vocabularies and structure of a subject domain