Presentation is loading. Please wait.

Presentation is loading. Please wait.

Metadata and the World Wide Web

Published bySuryadi Hengki Kartawijaya Modified over 6 years ago

Similar presentations

Presentation on theme: "Metadata and the World Wide Web"— Presentation transcript:

1 Metadata and the World Wide Web
Presented by Terry Vaughn INF 385E September 23, 2003

2 <metadata> What is it? Literally means data about data.
Data that describes the - Properties (name, size, data type) - Context (location, relationships, audience) of Information Resources - documents (html, pdf, doc) - images and video (jpg, tiff, mpg) - audio (mp3, wav) Can be a database record, part of the resource, or a surrogate file Must be structured and machine-readable

3 Analogs in the physical world
<metadata> Analogs in the physical world - Bibliographies - Indexes - Catalogs * Just imagine if we did not have these tools in the real world. How would you refer to or find information? You'd just have to flip through pages of books, etc. looking for what you wanted. * That analogy reflects the state of the WWW today (outside of intranets)

4 <metadata> What is its purpose?
For those who design information systems, it facilitates - Description - Organization - Management - Preservation For those who use information systems, it improves - Access - Quality - Relevance Bottom line: Proper implementation adds value

5 Implementations on the World Wide Web
<metadata> Implementations on the World Wide Web Extensible Markup Language (XML) - De facto standard for document markup - Grammar for most metadata schema on the web A sampling from the universe of metadata formats and schema Meta Content Framework (MCF) HTML <meta> tags Document Type Definition (DTD) Digital Item Declaration Language (DIDL) Platform for Internet Content Selection (PICS) Dublin Core (DC) RDF Site Summary (RSS) Darpa Agent Markup Language (DAML+OIL) Resource/Property/Value Syntax (RPV) SQL Data Definition Language (DDL) Resource Description Framework (RDF) YAML Ain't Markup Language (YAML)

6 Implementations on the World Wide Web
<metadata> Implementations on the World Wide Web Document Type Definition (DTD) Specifies the structure and elements that can be included in a document. Informs a validating parser what tags are valid and how they should be arranged

7 Implementations on the World Wide Web
<metadata> Implementations on the World Wide Web HTML <meta> tags - Set property/value pairs that describe the document - Can embed other standards like PICS or DC Example: <HEAD> <META http-equiv="PICS-Label" content='(PICS-1.1 " labels on " T08: ” until " T23: ” for " ratings (suds 0.5 density 0 color/hue 1)) '> <TITLE> ... document title ... </TITLE> </HEAD> Source: W3C.org

8 Implementations on the World Wide Web
<metadata> Implementations on the World Wide Web Meta Content Framework (MCF) - Seeks to establish a common metadata syntax and structure - Enables applications to manage resources without knowing schema in advance - Goal: Interoperability Applications - Describing the structure of websites and channels - Threading - E-commerce

9 Implementations on the World Wide Web
<metadata> Implementations on the World Wide Web Dublin Core (DC) Defines a basic element set for describing networked resources Has two levels: - Simple: Consists of 15 Elements - Qualified: Adds one more Element, Audience, and Qualifiers, which refine the semantics of the elements - Improves resource discovery for specialized domains DC Element Set - Content: Coverage, Description, Type, Relation, Source Subject, Title, Audience - Intellectual Property: Creator, Contributor, Publisher, Rights - Instantiation: Date, Format, Identifier, Language

10 <metadata> A few more for the road…
- Platform for Internet Content Selection (PICS) Resource Description Framework (RDF) RDF Site Summary (RSS) - Darpa Agent Markup Language (DAML+OIL)

11 New concepts relating to metadata
Information Foraging - Pioneered by Stuart Card, Peter Pirolli, et al. at PARC - Compares people seeking information to animals foraging for food - “Informavores” - People seek maximum return for minimum effort Information Scent - Description ~ Metadata ~ Scent - If information is not adequately described, it will not give off enough scent for those seeking it - Scent helps people decide what information to consume Goal: Make descriptions accurately represent the resource. People who are not seeking it will not waste their time, while those seeking it can find it faster with less effort.

12 <metadata> Looking forward Semantic Web
- Extension of the web where resources are given well-defined meaning and context - Enables applications to find, use, exchange and reuse resources more effectively - Relies on accurate metadata, ontologies - Standards: URI, XML, RDF, DAML+OIL

13 <metadata> Conclusions
People need information to survive and advance Metadata (physical or virtual) enables us to organize information Which, in turn, enables us to advance knowledge

14 <metadata> References
Berners-Lee, T., & Miller, E. (2002 , October). The Semantic Web Lifts Off. ERCIM News Online Edition, 51. Retrieved September 17, 2003, from Berners-Lee, T., Hendler, J. & Lassila, O. (2001, May). The Semantic Web. Scientific American.com. Retrieved September 17, 2003, from 84A9809EC588EF21&catID=2 Bray, T., Guha, R.V. (1997, June 6). Meta Content Framework Using XML. Retrieved September 16, 2003 from Card, S. & Pirolli, P. (1999, January). Information Foraging. Retrieved September 17, 2003 from Chi, E. H., Pirolli, P. & Pitkow, J. (2000). The Scent of a Site: A System for Analyzing and Predicting Information Scent, Usage, and Usability of a Web Site. Retrieved September 16, 2003, from CHI2000-WebVisualization.pdf Dean, M. (2003 , March 5). About DAML. Retrieved September 17, 2003, from DAML Program Web site:

15 <metadata> References
Hillmann, D. (2003, August 26). Using Dublin Core. Retrieved September 17, 2003 from Dublin Core Metadata Initiative Web site: Jacobs, I., Le Hors, A., & Raggett, D. (1999, December 24). Document Type Definition. HTML 4.01 Specification (chap. 21). Retrieved September 15, 2003 from W3C.org Web site: King, A. B. (2003, April 14). Introduction to RSS. Retrieved September 17, 2003, from Meta-data from FOLDOC. (1997, April 6). Retrieved September 12, 2003, from Free On-line Dictionary of Computing Web site: Nielsen, J. (2003 , June 30). Information Foraging: Why Google Makes People Leave Your Site Faster. Retrieved September 15, 2003, from Jakob Nielsen’s Alertbox Web site: Platform for Internet Content Selection (PICS). (2003, January 2). Retrieved September 17, 2003, from W3C.org Web site: Resource Description Framework (RDF). (2003, August 5). Retrieved September 17, 2003, from W3C.org Web site:

Download ppt "Metadata and the World Wide Web"

Similar presentations

Dublin Core for Digital Video: Overview of the ViDe Application Profile.

Dublin Core for Digital Video: Overview of the ViDe Application Profile.
DC2001, Tokyo DCMI Registry : Background and demonstration DC2001 Tokyo October 2001 Rachel Heery, UKOLN, University of Bath Harry Wagner, OCLC

DC2001, Tokyo DCMI Registry : Background and demonstration DC2001 Tokyo October 2001 Rachel Heery, UKOLN, University of Bath Harry Wagner, OCLC
Jim Hendler Chief Scientist - Information Systems Office DARPA.

Jim Hendler Chief Scientist - Information Systems Office DARPA.
Implementing Effective Metadata Brian Lavoie Office of Research OCLC Online Computer Library Center, Inc. Intranets 99, San Francisco April 27, 1999.

Implementing Effective Metadata Brian Lavoie Office of Research OCLC Online Computer Library Center, Inc. Intranets 99, San Francisco April 27, 1999.
Metadata vocabularies and ontologies Dr. Manjula Patel Technical Research and Development

Metadata vocabularies and ontologies Dr. Manjula Patel Technical Research and Development
UKOLN, University of Bath

UKOLN, University of Bath
W3C and RDF. Why OCLC is a W3C Member Access to networked information resources –the browser and online access –the breath and depth of networked information.

W3C and RDF. Why OCLC is a W3C Member Access to networked information resources –the browser and online access –the breath and depth of networked information.
The Institute for Learning and Research Technology is a national centre of excellence in the development and use of technology-based methods in teaching,

The Institute for Learning and Research Technology is a national centre of excellence in the development and use of technology-based methods in teaching,
DOCUMENT TYPES. Digital Documents Converting documents to an electronic format will preserve those documents, but how would such a process be organized?

DOCUMENT TYPES. Digital Documents Converting documents to an electronic format will preserve those documents, but how would such a process be organized?
The Semantic Web – WEEK 4: RDF

The Semantic Web – WEEK 4: RDF
Developing a Metadata Exchange Format for Mathematical Literature David Ruddy Project Euclid Cornell University Library DML 2010 Paris 7 July 2010.

Developing a Metadata Exchange Format for Mathematical Literature David Ruddy Project Euclid Cornell University Library DML 2010 Paris 7 July 2010.
CS570 Artificial Intelligence Semantic Web & Ontology 2

CS570 Artificial Intelligence Semantic Web & Ontology 2
The Web of data with meaning... By Michael Griffiths.

The Web of data with meaning... By Michael Griffiths.
1 Introduction to XML. XML eXtensible implies that users define tag content Markup implies it is a coded document Language implies it is a metalanguage.

1 Introduction to XML. XML eXtensible implies that users define tag content Markup implies it is a coded document Language implies it is a metalanguage.
An Introduction to Metadata by Wendy Duff ECURE 2000 October 6, 2000.

An Introduction to Metadata by Wendy Duff ECURE 2000 October 6, 2000.
Semantic Web Tools for Authoring and Using Analysis Results Richard Fikes Robert McCool Deborah McGuinness Sheila McIlraith Jessica Jenkins Knowledge Systems.

Semantic Web Tools for Authoring and Using Analysis Results Richard Fikes Robert McCool Deborah McGuinness Sheila McIlraith Jessica Jenkins Knowledge Systems.
Metadata: An Introduction By Wendy Duff October 13, 2001 ECURE.

Metadata: An Introduction By Wendy Duff October 13, 2001 ECURE.
© Tefko Saracevic, Rutgers University1 metadata considerations for digital libraries.

© Tefko Saracevic, Rutgers University1 metadata considerations for digital libraries.
COMP 6703 eScience Project Semantic Web for Museums Student : Lei Junran Client/Technical Supervisor : Tom Worthington Academic Supervisor : Peter Strazdins.

COMP 6703 eScience Project Semantic Web for Museums Student : Lei Junran Client/Technical Supervisor : Tom Worthington Academic Supervisor : Peter Strazdins.
RDF Kitty Turner. Current Situation there is hardly any metadata on the Web search engine sites do the equivalent of going through a library, reading.

RDF Kitty Turner. Current Situation there is hardly any metadata on the Web search engine sites do the equivalent of going through a library, reading.

Similar presentations

Ads by Google