jeromedl - the semantic digital library

Copyright 2007 Digital Enterprise Research Institute. All rights reserved. www.deri.org

Digital Enterprise Research Institute www.deri.ie

JeromeDLthe Semantic Digital Library

Sebastian R. Kruk, Stefan Decker

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Outline

Motivation From paper books to social media Semantic services in JeromeDL Social services in JeromeDL Metadata in use in JeromeDL Semantic DL in eLearning and Museums Conclusions


Social Semantic Information Spaces

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Motivation (1)

How to integrate and search information from different sources?

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Motivation (2)

How to share and interconnect knowledge in a digital library?

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The old days of paper books

Library: Archive (storage space) Bibliographic cards (metadata) Librarian (interface)

Pros: Someone to talk to, to explain, to help in searching Library as a meeting place

Cons: Based on physical location Libraries are not connected – we have to visit every

place

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Yesterday’s world of digital content

Digital library Database and archive (storage) Digital bibliographic descriptions (metadata) Full-text search (interface)

Pros: Content accessible online Federations of libraries – visit less places

Cons: Lonely user No one to talk to, we need to find the right keywords, what if

we do not know them (“man without an ear” paintings example)

Still many problems with interconnecting (different) libraries

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Tomorrow of interconnected, social media

Semantic Digital Libraries Semantic bibliographic description (interconnected

metadata) Annotations provided by users (social metadata) Collaborative search and browsing (interface)

Features Search and browsing based on semantics empowers users Users contribute to the classification process Users can understand community driven annotations Users enhance digital content using blogs, wikis on the

side RDF provides bases for interconnection of digital libraries


JeromeDL - Introduction

Joint effort of DERI, National University of Ireland,

Galway and Gdansk University of Technology

(GUT)

Distributed under BSD Open Source license

Digital library build on semantic web technologies

to answer requirements from: librarians, scientists

and communities.


JeromeDL - Properties

Support for different kinds of bibliographic medatata, like:

DublinCore, BibTeX and MARC21 at the same time.

Making use of existing rich sources of bibliographic descriptions

(like MARC21) created by human.

Supporting users and communities:

users have control over their profile information;

community-aware profiles are integrated with bibliographic

descriptions

support for community generated knowledge

Delivering communication between instances:

P2P mode for searching and user authentication

Hierarchical mode for browsing

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Metadata and Services in JeromeDL

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Semantic Metadata and Services

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MarcOnt Bibliographic Ontology MarcOnt Portal and feedback agent Mediation services: ontologizing metadata and

interconnecting with other libraries Search and Browsing

RDF Query and Natural Language Templates MultiBeeBrowse

Communication with heterogeneous networks of digital libraries


MarcOnt Initiative – Overview

Motivation: Provide set of tools for

collaborative ontology

development

MarcOnt Initiative goals: Create a framework for collaborative ontology improvement

Provide domain experts with tools to share their knowledge

Offer tools for data mediation between different data formats


MarcOnt Portal and MarcOnt Ontology

Sugested Poposals

Initial Ontology

Proposal discussion

Proposal anotations

Proposal votingProposal autopromoting

Versioning

Next RevisionMarcOnt Portal

MarcOnt Ontology: Central point of MarcOnt Initiative

Translation and mediation format

Continuos collaborative ontology

improvement

Knowledge from the domain experts

MarcOnt Portal (source of

knowledge): Suggestions

Annotations

Versioning

Ontology editor

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Mediation Services


Networks of Digital Libraries

ELP (Extensible Library Protocol) implementation communication within JeromeDL network

adapters for communication with other networks

D-FOAF integration (distributed user profile

management) single sign on and single registration within D-FOAF

network

HyperCuP integration

(scalable P2P network)

Independent ELP network entry point 0 0

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0

0

11

0

2 2

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Browsing the data graph

JeromeDL exploits interconnected data

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Browsing the data graph

… to allow browsing

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Social Semantic Collaborative Filtering

Goal: to enhance individual bookmarks with shared knowledge within a community

Users annotate catalogues of bookmarks with semantic information taken from DMoz or WordNet vocabularies

Catalogs can include (transclusion) friend's catalogues

Access to catalogues can be restricted with social networking-based polices

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Community-oriented, semantically-rich taxonomies

Information about a user's interest Flows of expertise from the domain expert Recommendations based on users previous

actions Support for metadata of community portals Integration with search and browsing in JeromeDL

to support collaborative search and browsing

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Social Semantic Collaborative

Filtering

foaf:knows

xfoaf:include

xfoaf:bookmark

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Sharing Knowledge with SSCF


Delivering Semantic Content

Providing semantic annotations during uploading

process: open module for handling any taxonomies

keywords based on WordNet and free tagging

defining structure of resources in the JeromeDL ontology

Lifting legacy metadata to MarcOnt ontology

Community maintained annotations social semantic collaborative filtering

semantic descriptions based on the FOAF metadata

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Annotating Library Resources


Semantic Information In Use

Searching: Keyword-based search with semantic query expansion

Semantic search:– Direct RDF quering

– Natural language templates

Browsing the data graph Sharing:


Semantically Interlinked Online Communities

Heterogeneous communication: Bibster,

OpenSearch/A9,

OAI-PMH

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Comparison between process based on

JeromeDL and a set of other services

Some tasks take shorter to execute with JeromeDL

Some tasks are automated within JeromeDL

Roughly 50% less time spend with JeromeDL

Evaluation of e-Learning Solution

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Museum Scenario

Museums have physical objects Should bind digital annotations with physical

objects Real-virtual tours

Start with real, guided tour Ubiquitous browse through context information Locate other exhibitions in the vicinity Share your knowledge and experience with others, leave

bread-crumbs for others Get the most of the exhibition during your visit

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Conclusions

New generation of Internet services can bring digital libraries: Closer to each other (interoperability) Closer to the users (online communities)

Social and semantic services delivered in digital libraries can enhance user experience in: E-Learning Real world (!) museums ... and other online and real services

JeromeDL is the first digital library that aims to implement these services

Growing number of JeromeDL instances world-wide: http://wiki.jeromedl.org/Instances

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JJeromeDL answereromeDL answerss various expectations various expectations

asas the Digital Library on Social Semantic Information the Digital Library on Social Semantic Information SpacesSpaces

http://www.jeromedl.org/http://wiki.jeromedl.org/

Sebastian Ryszard Kruk, Stefan DeckerDERI, NUI Galway, Ireland [email protected]

jeromedl - the semantic digital library

Technology

jeromedl semantic

semantic metadata

jeromedl ontology

jeromedl metadata

jeromedl social services

semantic annotations

semantic content

community users