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The PRISM Specification

The PRISM Specification. An Example of Metadata in Action Chet Ensign LexisNexis. Practical Impact of Metadata. LexisNexis provides authoritative content to information professionals Scale of content is very large: > 35,000 sources; > 40 TB data

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The PRISM Specification

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  1. The PRISM Specification An Example of Metadata in Action Chet Ensign LexisNexis

  2. Practical Impact of Metadata • LexisNexis provides authoritative content to information professionals • Scale of content is very large: • > 35,000 sources; > 40 TB data • Millions of searches/millions of documents retrieved daily • Multiple products/knowledge domains • Metadata is crucial to our services; full-text search is not sufficient

  3. Practical Impact of Metadata • Metadata plays multiple roles including: • Processing/inventory control • Access management • Classification • Identification • Occurs in doc headers, inline content & external stores • Multiple marketplace standards, broad, narrow, specialized & much overlap

  4. The PRISM Standard • XML metadata vocabulary for managing, multi-purposing and aggregating magazine and journal content • Defined by business users; implemented by technologists • Driven by set of defined business objectives • Incorporates existing standards where appropriate (e.g. Dublin Core)

  5. Example ... <dc:identifier>335398</dc:identifier> <pam:status>A</ pam:status > <prism:publicationName>ENTERTAINMENT WEEKLY</prism:publicationName> … <dc:subject>Television</dc:subject> <dc:subject>Movies</dc:subject> <prism:person>Chuck Barris</prism:person> …

  6. Example <body> <p class="deck">Was game-show king <pim:person>Chuck Barris </pim:person> a hitman or just a hitmaker? The subject of <pim:objectTitle>Confessions of a Dangerous Mind</pim:objectTitle> confronts his past lives. </p>

  7. Benefits to LexisNexis & Publishers • Accuracy: we don’t have to “guess” • Reliability: we get the metadata the publisher intended • Precision: we know where to find metadata • Enhancement: we get connections not possible by our post-processing • Cost-efficiency: less expensive to find, index & store the metadata we need

  8. For information on the PRISM specification and related information, go to: www.prismstandard.org

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