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The PRISM Specification: Transforming Metadata for Information Professionals

The PRISM Specification highlights the crucial role of metadata in the management and accessibility of vast information resources at LexisNexis. With over 35,000 sources and 40 TB of data, precise metadata processing is essential for effective inventory control, access management, and content classification. The standard uses XML to facilitate multi-purposing and aggregation of content from magazines and journals, ensuring accuracy and reliability. By employing Business-driven objectives and addressing marketplace standards, PRISM significantly enhances the retrieval and organization of information, benefitting both LexisNexis and publishers.

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The PRISM Specification: Transforming Metadata for Information Professionals

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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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