overview - rbms.inforbms.info/conferences2/preconfdocs/2011/seminarhsotelo.pdf · traditional...
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MANY HORSES: Context Collisions in the Networked Catalog
Aislinn Sotelo Coordinator of Technical Services,
Mandeville Special Collections Library, University of California, San Diego
and
Brad Westbrook Metadata Librarian & Digital Archivist
University of California, San Diego RBMS Preconference 2011, Baton Rouge, LA, June 23
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Problem Summary Collisions at Macro Level
Collisions at Micro Level
Effects on Quality of the Catalog
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Overview
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Traditional catalogs Local collections, local audiences, and local
policies, Especially special collections catalogs
Next generation catalogs Aggregation of traditional catalogs Proliferation of context collisions
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Problem Summary
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Special collections catalog and machine technologies Accelerates bibliographic description Leads to access standards Machine readable formats extended to
accommodate copy specific / local information
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Collisions at the Macro Level
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Word Sentence
Paragraph
Chapter
Book Opera Omnia
Life and times Readers
Data element Data record
Catalog
Policies and practices
Collections Community
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Context Chains
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Context Collision in Next-Gen Catalogs
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Representative types of context collisions from UC catalogs Genre terms
Relator terms
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Collision at the Micro Level
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UC Irvine’s Genre Term Policies
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UC Irvine’s Local Genre File
Artists’ books |z California |z Berkeley |y 20th Century Artists’ books |z California |z Berkeley |y 20th Century |x Women Authors Artists’ books |z California |z Berkeley |y 21th Century |x Women Authors
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Genre Comparison
UC Berkeley
UC San Diego UCLA
Artists Books California 1970-1979 Artists Books California 1980-1989 Artists Books California 1990-1999 Artists Books California San Diego 2000-2009
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Aggregated
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Aggregated
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The Battle of Special Files
Artists' books. Artists' books ǂy 1997. ǂ2 rbgenr Accordion fold format (Binding) ǂy 1997. ǂ2 rbgenr Flying Fish Press.
Artists' books -- California -- 1990-1999. Accordion fold format (Binding) -- 1990-1999.
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UCLA’s Library Catalog
Artists’ books --Specimens. Accordion fold format (Binding) --California --Berkeley --1997. Artists’ books --California --Berkeley --1997.
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Relator Term Granularity Vocalist vs. Performer
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Domingo, Plácido, 1941- Domingo, Plácido, 1941-, Voc. Domingo, Plácido, 1941-, Prf.
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Varying Granularity When Aggregated
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Recall: the fraction of all documents
relevant to a query that are retrieved Precision: the fraction of all retrieved
documents by a query that are relevant Inference: Ability to conclude that the set
of items retrieved for a query is exhaustive
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Effects on the Quality of the Catalog
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Performance of Local Catalog
Precision and
Recall
Retrieved Documents
Relevant Documents
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Relevant Documents
Retrieved Documents
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Performance of Aggregated Catalog
Precision and
Recall
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Statistically verify the degradation of
catalog performance Investigate / develop methods for
resolving or minimizing conflict collections Look to work re: quality shareable metadata
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Next Steps
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THANK YOU!
QUESTIONS?