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.
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
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;>
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
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/
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/>