CS 502 Computing Methods for Digital Libraries Cornell University - PowerPoint PPT Presentation

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CS 502 Computing Methods for Digital Libraries Cornell University

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Cornell University Computer Science. Herbert Van de ... The Information Gateway: The KnowledgeBase. The KnowledgeBase includes all the library Resources ... – PowerPoint PPT presentation

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Title: CS 502 Computing Methods for Digital Libraries Cornell University


1
CS 502 Computing Methods for Digital
LibrariesCornell University Computer
ScienceHerbert Van de Sompelherbertv_at_cs.cornell.
edu
Lab federated searching searching distributed
data searching harvested data
Access to PC orpcuser orpcpw
2
federated services
3
federated searching
  • Distributed search approach Z39.50, SDLIP, ...
  • today MetaLib
  • commercial product by Ex Libris
  • searches repositories using whichever
    technique
  • normalizes results before presenting them to the
    user
  • can merge results after initial presentation
  • Harvesting approach OAI
  • today ARC, the first OAI service provider

4
MetaLib
  • Goal Unique, consistent interface across library
    resources (think Google for library collection)
  • Broadcast searching over a large collection of
    heterogeneous resources
  • Different metadata syntax (MARC, EAD, Dublin
    Core, TEI, unspecified, ...)
  • Different protocols (Z39.50, HTTP, native ALEPH,
    screen scraping)
  • Linking via integrated SFX server
  • User personalization
  • Administration of resources

5
Application Level
Technology Level
Universal Gateway
Information Gateway
User Admin
Accurate, target-sensitive searching
Context-sensitive linking
Customized, personalized services
Resources administering
6
Universal Gateway
User Admin
Information Gateway
Resources administering
Accurate, target-sensitive searching
Context-sensitive linking
Customized, personalized services
7
The Information Gateway The KnowledgeBase
The KnowledgeBase includes all the library
Resources
  • Cataloging Information (per collection)
  • Name of collection, owner, subject, services,
    language
  • Configuration Information (per MetaLib resource)
  • Interfacing protocol, internal format, rules of
    conversion

R e s o u r c e s
8
KnowledgeBase
Example of cataloged collection
USMARC
245 Title Queen Elizabeth II Library 270
Location Memorial University of Newfoundland
St. Johns, Newfoundland Canada AC15S7 307
Access Times Monday-Thursday 830-2045 Closed
Saturdays 520 Description Main library covers
humanities, science, computers, physical ed,
social sciences, and engineering 546
Language English 531 Access Open to the
public 901 Administrator Iscott_at_mun.ca 650
Subject Computer Science 650 Subject Pure
Science 650 Subject Humanities
9
Universal Gateway
User Admin
Information Gateway
Accurate, target-sensitive searching
Context-sensitive linking
Customized, personalized services
Database of catalogs and databases
10
Search Processed to Conform to Information
Resources
Universal Gateway
ALEPH
OTHER
HTTP
Z39.50
D i v e r s e I n f o r m a t i o n R e s o
u r c e s
11
Search Command Adapted to Various Resources
Kryger, Meir
Author
Title
sleep
12
The Universal Gateway enables the use of basic
components via API
Universal Gateway
FIND
PRESENT
COMBINE SET
FIND DUPLICATES
U n i v e r s a l G a t e w a y F u n c t i
o n s
13
URLs
Distributed approach MetaLib http//metalib01.ex
libris-usa.com/V Harvesting approach ARC
http//arc.cs.odu.edu/
14
Pop quiz reference linking papers
  • Go http//63.70.76.278080/cs502/
  • Logon
  • Box 1 Firstname
  • Box 2 Lastname
  • Box 3 netid
  • Click take
  • Take Quiz
  • Submit all responses at once

15
Make-up Pop quiz SODA and FEDORA papers
  • Go http//63.70.76.278080/cs502/
  • Logon
  • Box 1 Firstname
  • Box 2 Lastname
  • Box 3 netid
  • Click take
  • Take Quiz
  • Submit all responses at once
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