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Digital Library Integration-------

Masters Project and Masters Thesis Summer and Fall 2005

CIS 786 / CIS 485 - Fall 2005

Prof. Bieber

Information Systems Department

New Jersey Institute of Technology

http://is.njit.edu/integralMarch 2005

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Outline• Motivation• Illustrations• Structural Relationships• 3 Types of Integration• Personalizing Links• Federated Metasearch• Contributions and Vision• Project Details• Call for Collaboration

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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)...

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Integration through Linking• automatically generate link anchors on elements

recognizedbased 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

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Prototype

Services for a launch-date element:- search by launch date- search by month and year- search by year

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Prototype

Services for a document element:- open- summarize in 3 sentences

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Mock-up for alibrary database

Services from multiple systems(customized to user tasks/preferences)

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structural elementsand links

lexical elementsand links

Two Types of Links:(1) structural based on element type * title, author, source(2) lexical (found in a glossary)

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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$127,322.12

2002 Expenses2002 Sales

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Outline• Motivation• Illustrations• Structural Relationships• 3 Types of Integration• Personalizing Links• Federated Metasearch• Contributions and Vision• Project Details• Call for Collaboration

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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.

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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.

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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 ==>

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Example Linking Rulefrom 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

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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

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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

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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 DesktopMetainformation Engine

ME Lexical Analysis

existing system or Web service

usesJava,XML,XPath,etc.

Internal Architecture

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Benefits of Integrationfor 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)

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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

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VisionA 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!