Session6
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This document provides an overview of metadata, including what it is, common schemas like Dublin Core, how it is used, and why it is important. Metadata is "data about data" that describes content, quality and other characteristics of data. It is used to help organize and provide access to resources through elements like title, creator, subject, and date. Metadata plays an important role for search engines and systematic organization of information.
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Session6
- 1. Metadata basics for libraries IST 523 March 5, 2008 Denise A. Garofalo
- 2. Topics to be covered • What is metadata? • What is Dublin Core? • What is syntax? • How are metadata used? • Search engines and metadata • Why use metadata?
- 3. What is metadata? • (metadata is plural, like data) • quot;data about dataquot; • “information about information.” • answers who, what, when, where, why, and how
- 4. Who.. • collected the data • distributed the data
- 5. What... • subject • processing • projection
- 9. How…. • collected • should it be used • much did it cost
- 10. In other words it describes • content • quality • condition • other characteristics of data
- 11. Metadata schemas • Dublin Core • AACR2 • GILS • EAD • IMS • AGLS
- 12. Dublin Core
- 13. Dublin Core • Popular metadata schema (element set) • 15 broad categories • widely used in libraries
- 14. Dublin Core elements • Title – name • Author/creator – person primarily responsible • Subject/keyword – topics
- 15. Dublin Core elements • Description – description of the contents • Publisher – responsible for availability • Other contributors – others who made contributions
- 16. Dublin Core elements • Date – date resource available • Resource Type – category • Format – data format of the resource
- 17. Dublin Core elements • Resource identifier – ID number • Source – Where resource came from • Language – of the intellectual content
- 18. Dublin Core elements • Relation – relationship • Coverage – location and duration • Rights Management – copyright notice, etc.
- 19. What is syntax? • Not strictly part of schema • Needed for processing • Common syntax schemes are: – HTML, SGML, XML – RDF – MARC – MIME
- 20. How are metadata used? • embedded in a web page • as a separate HTML document • in a database
- 21. Web pages • Simple • Part of page creation • <meta> tags – <title> – <META name=quot;Keywordsquot; content=quot;first, second, thirdquot;> – <META name=quot;Descriptionquot; content=quot;Your descriptionquot;>
- 22. Search engines • Functions • History
- 23. Meta tags and search engines • The introduction of the <META> element as part of HTML coding was, in part, an attempt to encourage search engines to extract and index more structured data, such as description and keywords
- 24. Why? • Search engines are proprietary in processing meta tags
- 25. Why use metadata? • Systematic • Access
- 26. Example (Dublin Core) • <HTML> !4.0! <HEAD> <TITLE> A Dirge </TITLE> <META NAME=quot;DC.Titlequot; CONTENT=quot;A Dirgequot;> <META NAME=quot;DC.Creatorquot; CONTENT=quot; Shelley, Percy Bysshequot;> <META NAME=quot;DC.Typequot; CONTENT=quot;textquot;> <META NAME=quot;DC.Datequot; CONTENT=quot;1820quot;> <META NAME=quot;DC.Formatquot; CONTENT=quot;text/htmlquot;> <META NAME=quot;DC.Identifierquot; CONTENT=quot; http://purl.org/DC/elements/1.0/quot;> </HEAD> <BODY><PRE>
- 27. Example continued • Rough wind, that moanest loud • Grief too sad for song; • Wild wind, when sullen cloud • Knells all the night long; • Sad storm, whose tears are vain, • Bare woods, whose branches strain, • Deep caves and dreary main, • - Wail, for the world's wrong! • </PRE></BODY> </HTML>
- 28. Where is metadata stored? • Embedded in a web page • as a separate document • in a database
- 29. How is metadata created? • Tools – DC-dot - http://www.ukoln.ac.uk/metadata/dcdot/ – DCmeta - http://www.dstc.edu.au/RDU/MetaWeb/generic_tool. html – HotMeta - http://www.dstc.edu.au/Research/Projects/hotmeta/
- 30. Metadata creation • Ideally with a purpose-built tool • Keep from-scratch creation to a minimum
- 31. Resources • The IFLA Metadata Resources page The most comprehensive guide to metadata resources available on the World Wide Web. <URL:http://www.ifla.org/II/metadata.htm> • Meta tags can index, organize your Web pages By Jeff Frentzen <URL:http://www8.zdnet.com/pcweek/ir/0113/13jia.html >
- 32. Resources • Making a MARC with Dublin Core By Jon Knight in issue 8 of Ariadne. <URL:http://www.ariadne.ac.uk/issue8/marc/> • META Tagging for Search Engines Describes the use of the <META> tag for specifying to search engines how the document to be indexed. <URL:http://WWW.Stars.com/Location/Meta/Tag.html>
- 33. More resources • Web4Lib Electronic Discussion An electronic discussion for library-based World-Wide Web managers. <URL:http://sunsite.berkeley.edu/Web4Lib/> • Metadata Glossary A draft metadata term maintained by Michael Day <URL:http://www.ukoln.ac.uk/metadata/glossary/>