Bieber et al., NJIT © Slide 1 Digital Library Integration Masters Project and Masters Thesis Summer and Fall 2005 CIS 786 / CIS Fall 2005 Prof. Bieber Information Systems Department New Jersey Institute of Technology March 2005

Bieber et al., NJIT © Slide 2 Outline Motivation Illustrations Structural Relationships 3 Types of Integration Personalizing Links Federated Metasearch Contributions and Vision Project Details Call for Collaboration

Bieber et al., NJIT © Slide 3 Challenges for Library Users Need to know what resources to use before they can access them Finding related information outside current system Need to leave current page to do related tasks Why? Library resources aren’t integrated well ==> Project Goal: –Bring relevant resources directly to the user Library resources: databases (e.g., EBSCOhost, ACM Digital Library), external digital libraries, on-line catalog, special collections, library services (e.g., interlibrary loan)...

Bieber et al., NJIT © Slide 4 Integration through Linking automatically generate link anchors on elements recognized based on: –structural relationships –lexical relationships automatically generate links –to related information –to relevant services ==> lightweight integration of –documents containing links and –documents/services the links point to

Bieber et al., NJIT © Slide 5 Prototype Services for a launch-date element: - search by launch date - search by month and year - search by year

Bieber et al., NJIT © Slide 6 Prototype Services for a document element: - open - summarize in 3 sentences

Bieber et al., NJIT © Slide 7 Mock-up for a library database Services from multiple systems (customized to user tasks/preferences)

Bieber et al., NJIT © Slide 8 structural elements and links lexical elements and links Two Types of Links: (1) structural based on element type * title, author, source (2) lexical (found in a glossary)

Bieber et al., NJIT © Slide 9 Structural Relationships Links generated based on application structure, not search or lexical analysis –You cannot do a search on the display text “$127,322.12” to find related information… –But you can find relationships for the element Sales[2002] $85,101.99$127, Expenses2002 Sales

Bieber et al., NJIT © Slide 10 Outline Motivation Illustrations Structural Relationships 3 Types of Integration Personalizing Links Federated Metasearch Contributions and Vision Project Details Call for Collaboration

Bieber et al., NJIT © Slide 11 Three Types of Integration: (1) for documents to receive anchors and links (2) to provide services (which become links) (3) to provide glossaries for content analysis Require a document schema mapper to recognize structural elements: -wrapper -fixed template -XML markup -etc.

Bieber et al., NJIT © Slide 12 Three Types of Integration: (1) for documents to receive anchors and links (2) to provide services (which become links) (3) to provide glossaries for content analysis Linking Rules represent * every service * that a system can provide * for each kind of element.

Bieber et al., NJIT © Slide 13 Three Types of Integration: (1) for documents to receive anchors and links (2) to provide services (which become links) (3) to provide glossaries for content analysis Linking Rules represent * every service * that a system can provide * for each kind of element. Example ==>

Bieber et al., NJIT © Slide 14 Example Linking Rule from the AskNSDL system –a) element type (“concept”) –b) link display label (“Ask an expert about this”) –c) relationship metadata –d) destination collection or service (“Ask NSDL”) –e) the exact command to send to the destination system (logs the user into AskNSDL, opens question template, fills in the element instance (i.e., “physics teaching”) as the subject, and places the cursor in the question area) –f) any relevant conditions for including this relationship

Bieber et al., NJIT © Slide 15 Three Types of Integration: (1) for documents to receive anchors and links (2) to provide services (which become links) (3) to provide glossaries for content analysis Lexical analysis by: NJIT Noun Phrase Extractor NJIT Ontology Developer

Bieber et al., NJIT © Slide 16 Each system is integrated independently: (1) Schema mappers for individual systems (2) Linking rules are plugged in” independently for each service (3) Glossaries and thesauri can be independent of other systems

Bieber et al., NJIT © Slide 17 User’s Web Browser AskNSDL Schema Mapper AVC Schema Mapper NSSDC Schema Mapper CI Search Service Schema Mapper Service Schema Mapper (i) AskNSDL AVC N’l Space Science Data Center NSDL CI Search Service Service (i) ME Link Mapping Engine ME Broker ME Desktop Metainformation Engine ME Lexical Analysis existing system or Web service uses Java, XML, XPath, etc. Internal Architecture

Bieber et al., NJIT © Slide 18 Benefits of Integration for a system (collection/service) Users: direct access to related systems –enlarges a system’s feature set Links leads users to a system –systems gain wider use Users become aware of other systems –systems gain wider awareness Direct access to a system’s features –streamlined access (bypassing menus)

Bieber et al., NJIT © Slide 19 Contributions straightforward, sustainable approach for integrating documents and services –Lightweight integration through linking combining structural links with content-based links next-generation collaborative filtering federated metasearch integrating traditional and digital libraries widespread dissemination

Bieber et al., NJIT © Slide 20 Vision A nationwide virtual library to and from –your local library –other physical libraries –digital libraries incorporating –traditional library resources –digital library resources Bringing relevant resources directly to the user!