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Sponsored by
U.S. Department of Education’s
National Library of Education
Special Project ofERIC Clearinghouse on Information
& Technology
Syracuse University
Presentation Outline• What is GEM? • Timeline• Technical Implementation/Tools• GEM Element Set• GEM Profile• Dublin Core
The Gateway to Educational Materials (GEM)
GEM is a consortium effort to provide educators with quick and easy access to the substantial, but uncataloged, collection of educational materials found on various federal, state, university, non-
profit, and commercial Internet sites.
Timeline
Nov ‘96
Dublin Core
Timeline
Nov ‘96
Dublin Core
June ‘97
Beta -Tools & Catalog
Timeline
Nov ‘96
Dublin Core
June ‘97
Beta -Tools & Catalog
Cataloging begins
Sept ‘97
Timeline
Nov ‘96
Dublin Core
June ‘97
Beta -Tools & Catalog
Dec ‘97
Cataloging begins
Sept ‘97
700 records8 collections
Timeline
Nov ‘96
Dublin Core
June ‘97
Beta -Tools & Catalog
Dec ‘97
Cataloging Begins
Oct ‘98
3000 records45 collections
Sept ‘97
700 records8 collections
Model for “Distributing” GEM Metadata–
GEM Tools
Resources
Resources
SeparateMetadata
EmbeddedMetadata
Metadata
Metadata
Resources
SeparateMetadata
EmbeddedMetadata
Metadata
Metadata
Harvest
Harvest
Local Site
Index
Resources
SeparateMetadata
EmbeddedMetadata
Metadata
Metadata
Harvest
Harvest
Local Site
IndexUnion
The Gateway
Resources
SeparateMetadata
EmbeddedMetadata
Metadata
Metadata
Harvest
Harvest
Local Site
IndexUnion
The Gateway
Search
Browse
GEM Tools
• GEMCat Cataloging Module
• Cross site Harvest
• Browse-builder
• PLWeb Search Engine
Metadata Continuum
Simple& Terse
Complex& Rich
Lycos Dublin Core USMARCLocation Discovery Documentation
Metadata Continuum
Simple& Terse
Complex& Rich
Lycos Dublin Core USMARCLocation Discovery Documentation
GEM Level 1Cataloging
Metadata Continuum
Simple& Terse
Complex& Rich
Lycos Dublin Core USMARCLocation Discovery Documentation
GEM Level 1Cataloging
GEM Level 2Cataloging
GEM Element Set
23 Elements
• 15 Dublin Core
• 8 GEM Elements
GEM Element Set• Audience• Duration• Essential Resources• Grade Level• Pedagogy• Academic Standards• Quality Indicators• Cataloging Agency
GEM Element Set
Controlled Vocabularies:
• Audience• Format• Grade Level• Pedagogy• Resource Type• Subject
GEM Element Set
Fully DC compliant:
• All optional
• All repeatable
• Anyone can use, anyway they like
GEM Profile 1999The rules for implementing the 23 DC/GEM
Elements in The Gateway Catalog:
• Mandatory and Optional
• Repeatable and not repeatable
GEM Profile 1999
Consists of:
• 8 GEM Elements
• 13 Dublin Core Elements
GEM Profile 1999
Do Not Use:
Other Contributor
Use:
Creator (role)
GEM Profile 1999
Do Not Use:
Source
Use:
Relation (is source of)
Dublin Core:Current Thoughts
Dublin Core
What would help:• standardize DC simple• establish/adopt/recommend ”core”
subelements• schedule for standardizing subelements• DC WWW site - latest information
Dublin Core
Dublin Core Works!!
• Optional • Qualifiers • Schemes • Extensibility
Contact:
Documentation:
http://www.geminfo.org
The Gateway Catalog:
http://www.thegateway.org