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The PRISM Specification
An Example of Metadata in Action
Chet EnsignLexisNexis
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
Practical Impact of Metadata
Metadata plays multiple roles including:Processing/inventory controlAccess managementClassification Identification
Occurs in doc headers, inline content & external stores Multiple marketplace standards, broad, narrow, specialized & much overlap
The PRISM Standard
XML metadata vocabulary for managing, multi-purposing and aggregating magazine and journal content Defined by business users; implemented by technologistsDriven by set of defined business objectives Incorporates existing standards where appropriate (e.g. Dublin Core)
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>…
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>
Benefits to LexisNexis & Publishers
Accuracy: we don’t have to “guess” Reliability: we get the metadata the publisher intendedPrecision: 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
For information on the PRISM specification and related information, go to:
www.prismstandard.org
