Internet Resources Discovery (IRD)

1
Internet Resources Discovery (IRD)

• Additional Aspects

2
Additional Aspects

• Personal vs. public library
• Multimedia library
• Library composition and cccess
• Search engines vs. Digital libraries
• Parallel evolution of SE/DLs

3
Personal vs. Public Library
4
Multimedia DL

• Mixed Media Library
• Multimedia Summaries
• Multimedia User Interface
• Query by Example
• Hypermedia Support
• Multimedia Engine
• MMDB (Multimedia Database)
• MMIR (Multimedia Information Retrieval)

5
Composed Digital Libraries
University Library
Exact Sciences
Life Sciences
Social Sciences
Computer Science
Chemistry
Software
Hardware
6
Search Results Several Possible Representations

• Document Titles - Ranked
• Summaries
• Abstracts
• Full Documents

7
DL Access Methods
Natural LanguageDeclarative Procedural
Transparent Access
Search on Keywords/Fields
Browse/Navigate
View/Cross
Full Index
Topics Tree
Relations
DL Summaries
Resources
Documents
8
Many Access Methods?
9
Search Engine
Directory
10
SE vs. DL Potential Coverage
Resources
SE
Relevant
DL
11
SE vs. DL - Server Side
12
SE vs. DL - Client Side
13
Resource Repositories Hierarchy
Directory (Catalog, Guide, Subject Gateway)
Basic SE (BSE)
Popularity SE (PSE)
Harvested DL (HDL)
Federated DL (FDL)
Stand Alone DL (SDL)
Meta SE (MSE)
14
Parallel Evolution of SEs and DLs
Search Engines Generations
Digital Libraries Generations
1st Generation Single DL (SDL) local,
classical, focused material, digitized or
scanned
1st Generation Basic Search Engine includes
Robots, Indices, Directories, basic/advanced user
interfaces
2nd Generation Meta Search Engine uses several
basic-SEs simultaneously, ranks gathered pages
by relevancy
2nd Generation Federated (FDL) several
autonomous SDLs representing heterogeneous
networked repositories
3rd Generation Popularity Search Engine uses
link analysis and use frequency measures to
filter and rank the Web pages
3rd Generation Harvested (HDL) contains only
summaries and metadata structures domain
focused, of fine granularity
15
Next Generations