• GuidelinesForNewDatamodel
• PatternLanguage
• FRBR Relations

FRBR Relations **

Context

When creating a data-model where many objects will be of the same work, (see [:GuidelinesForNewDatamodel/PatternLanguage/Audio Collection/Clasical Music:Clasical Music]) the use of the FRBR model can aid the planning of object relations at the levels between the collection (see [:GuidelinesForNewDatamodel/PatternLanguage/Collections In General:Collections In General]) and the file-object (see [:GuidelinesForNewDatamodel/PatternLanguage/File-Objects:file-objects]). attachment:FRBR_in_Fedora.png

Description of pattern

When there is a multitude, especially of Expressions, Manifestations and Item's, of the work it can be very prudent to include a relation in the data-model to reflect this

Problem description

There are certain types of item groups within the library where there are many representations of the same work, take for instance the 7th symphony by Beethoven, an attempt to illustrate this form of construction is shown below.

attachment:Beethoven's%207th%20Symphony_FRBR.png

|| Item BR || The digitized CD || The Digitized LP || A recording of the Televised concert ||

A Manifestation can have several fedora file-objects, for instance recordings from [http://en.wikipedia.org/wiki/Phonograph_cylinder Phonograph cylinders] have been digitized for some items in multiple versions since the original playback speed is unknown.

Use the structure of the data to strengthen the data-model, consider combining one-to-one mappings into one structure in the design of the datamodel, for instance Van goghs painting [http://upload.wikimedia.org/wikipedia/commons/4/46/Vincent_Willem_van_Gogh_127.jpg Tournesols] is one Work with one Expression, but several Manifestations(one painting+many photographs) and thus many Items allowing for Work and Expression to be combined into one datastructure, this will most likely apply to many paintings

Solution

Use the nature of the collection to influence the FRBR relations in order to maximize the uniqueness of each data-object in the DOMS

Consider next

This Pattern will influence the pattens within the FRBR model namely the [:GuidelinesForNewDatamodel/PatternLanguage/FRBR Relations/Work:Work], [:GuidelinesForNewDatamodel/PatternLanguage/FRBR Relations/Expression:Expression], [:GuidelinesForNewDatamodel/PatternLanguage/FRBR Relations/Manifestation:Manifestation] and [:GuidelinesForNewDatamodel/PatternLanguage/FRBR Relations/Item:Item] patterns, these should not be decided on before taking this document into account.