Title: CS 502 Computing Methods for Digital Libraries Cornell University
1CS 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
2federated services
3federated 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
4MetaLib
- 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
5Application Level
Technology Level
Universal Gateway
Information Gateway
User Admin
Accurate, target-sensitive searching
Context-sensitive linking
Customized, personalized services
Resources administering
6Universal Gateway
User Admin
Information Gateway
Resources administering
Accurate, target-sensitive searching
Context-sensitive linking
Customized, personalized services
7The 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
8KnowledgeBase
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
9Universal Gateway
User Admin
Information Gateway
Accurate, target-sensitive searching
Context-sensitive linking
Customized, personalized services
Database of catalogs and databases
10Search 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
11Search Command Adapted to Various Resources
Kryger, Meir
Author
Title
sleep
12The 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
13URLs
Distributed approach MetaLib http//metalib01.ex
libris-usa.com/V Harvesting approach ARC
http//arc.cs.odu.edu/
14Pop 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
15Make-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