26) Robert Maxwell has provided a much more detailed discussion, which treats diagramming methods for entity-relationship
models, comparing Chen's system and those used in FRBR and FRAD, and then moves to a consideration of the FRBR entities, relationships, and user tasks, ending with a comparison between the FRBR model and catalogue records produced under AACR2.
Let us briefly review the key definitions of Entity-Relationship
schemata following .
model--toward a unified view of data.
Fidel & Crandall (1988) described the Anglo-American cataloguing rules from a generalized database approach, using the entity-relationship
model to suggest a problem-based typology of rules that might underlie a theoretical framework of rules for bibliographic database design.
Chen: "The Entity-Relationship
Model - Towards a Unified View of Data",ACM TODS Vol 1, No 1, March 1976.
This research investigated how the relationships can be implemented for more efficient urban land and building management using the entity-relationship
model and relational database model.
The REA framework, first introduced by McCarthy in 1982, is based on accounting theory, including Sorter's (1969) work on events accounting, and on database theory, including Chen's (1976) work on entity-relationship
(E-R) design has a reputation as a useful but difficult to master tool for mapping clear database designs.
dataflow diagrams and entity-relationship
0, an entity-relationship
diagramming tool; and oAzium Smart Card plug-in, which adds smart card technology to solutions built in FileMaker Pro (http://www.
Aqua Data Studio's popular Entity-Relationship
Modeler has also been extended this time around, now with the ability to convert or translate an ER model from one database to another.
Specific topics include entity-relationship
database modeling, user tasks, and a comparison of current cataloging practice with what it would look like if FRBR principles were used.