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.
Work part of DOMS meta-data BR Beethovens 7th symphony |
Expression part of DOMS meta-data BR The musical work as performed by the Philadelphia Symphony Orchestra, conducted by Leopold Stokowski BR The musical work as performed by DR's Symfoniorkester BR The composer's notated music BR |
Manifestation part of DOMS meta-data BR Recordings released on 78 rpm sound discs in 1948 by Tono BR Recordings released on cd's in 1992 by CBS Records BR The musical work televised by DR in 1994 BR The notes on Beethovens 7th symphony |
Item fedora file-object and DOMS digitization meta-data BR The 78 rpm sound disc stored at the State and University Library with call-no.: SM 517748 BR The digital audio file derived from the cd released in 1992 by CBS Records BR The digital audio file derived from the 78 rpm sound discs released in 1948 by Tono BR The digital video file derived from the concert televised in 1994 by DR |
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.