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Implementing Effective Metadata Brian Lavoie Office of Research OCLC Online Computer Library Center, Inc. Intranets 99, San Francisco April 27, 1999.

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Presentation on theme: "Implementing Effective Metadata Brian Lavoie Office of Research OCLC Online Computer Library Center, Inc. Intranets 99, San Francisco April 27, 1999."— Presentation transcript:

1 Implementing Effective Metadata Brian Lavoie Office of Research OCLC Online Computer Library Center, Inc. Intranets 99, San Francisco April 27, 1999

2 Roadmap I.Metadata for Networked Resources II. Implementing Metadata in HTML Documents III.Metadata Element Sets IV.The Dublin Core: Overview and Implementation in HTML V.Summary

3 Metadata Data that provides information about a resource –to manage information collections –to facilitate resource discovery Can be created for information resources of any kind, in any medium … for example: –Books: bibliographic data in a card catalog –Computer programs: comments in source code

4 Metadata for Networked Resources Why metadata? Problem: Rapid growth in networked resources leads to increasingly chaotic information collections. –As size and scope of collection expands, simple keyword indexing becomes less effective. Solution: Need metadata framework that: –enables richer description than keyword indexing. –is usable by content managers who are not necessarily resource description specialists. –is simple and inexpensive to implement.

5 HTML (Hypertext Markup Language) Tag-based markup language for structured, hyperlinked documents My Document A Sample HTML Document Click here

6 Implementing Metadata in HTML Documents The META tag: Container for embedded resource description Name Attribute = property or characteristic of a resource (e.g., title, author, keywords) Content Attribute = specific value of a property (e.g., War and Peace, Leo Tolstoy, Russian literature)

7 META Tag Usage: Example HTML Document

8 The META Tag and Search Engines Enter: +intranets +information professionals into AltaVista search engine … returns: Intranets 99 Intranets '99 Conference URL: Last modified 17-Dec-98 - page size 5K - in English [Translate]

9 Inconsistency Across Name Attribute Values

10 Inconsistency Across Content Attribute Values … CONTENT="JJR ENTERPRISES - … CONTENT="TIM SCHAEFER, COPYRIGHT 1997, 1998 ALL RIGHTS RESERVED"> … CONTENT="RWM "> … CONTENT="CLOTHING">

11 The META Tag: Pros and Cons PROS... Useful container for embedded resource description. Easily adapted for use by automated document management or search/retrieval applications. CONS... No guidelines on how to fill out the tag. Prone to inconsistency and misusage. Need to supplement the META tag with a more structured approach to the metadata itself...

12 Metadata Element Sets A set of descriptive elements with well- defined interpretations (semantics) that collectively form a description of a resource. Eliminates inconsistencies and enhances the usefulness of metadata in managing and locating resources, by describing resources in a standard, consistent way.

13 The Dublin Core Metadata Initiative Metadata element set intended to facilitate description and discovery of electronic resources. Usable by non-experts, as well as resource description specialists. Extensible, for richer resource descriptions. Development has benefited from participation of an international cross-section of communities: libraries, museums, government agencies, corporations...

14 The 15 Dublin Core Metadata Elements TitleAuthor or Creator Subject and KeywordsDescription PublisherOther Contributor DateResource Type FormatResource Identifier SourceLanguage RelationCoverage Rights Management

15 Implementing Dublin Core: The META Tag Revisited HTML Metadata Container:...

16 Extending the Dublin Core Sometimes more detailed description of a resource is needed than the 15 core elements can provide. Dublin Core can be extended with qualifiers:

17 More Ways to Clarify Metadata

18 Metadata in Action:

19 Gilder Lehrman Exhibition Calendar

20 Embedded Metadata

21 Derived Metadata Record Title:Exhibitions Calendar of Gilder Lehrman Documents Creator:Paul Romaine Subject:Calendar, exhibitions in New York,... Description:Calendar of exhibitions, principally in New York... Publisher:The Gilder Lehrman Collection Contributor:Robert Parks Date: Type:Bibliography Format:text/html Identifier:http://www.gilderlehrman.com/HTM/exhibitions/index.html Language:English

22 Summary: Implementing Effective Metadata Implementing Metadata: META tag provides framework for deploying metadata as embedded resource description in HTML documents. Implementing Effective Metadata: Use a well-defined metadata element set. Dublin Core offers rich description; usable by description experts and non-experts; simple and inexpensive to implement. Clarify potentially ambiguous metadata with LINK tag and scheme attribute.

23 For More Information... META Tag: Metadata: Dublin Core:


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