Semantics & Knowledge Management

Chennai17.2.2004

Steffen StaabPriv.-Doz. Dr.rer.nat.

Institute AIFB, Universität Karlsruhehttp://www.aifb.uni-karlsruhe.de/WBS

Ontoprise GmbH, Karlsruhe - Semantics for the Web -

http://www.ontoprise.de

AIFB

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© Steffen Staab 2004

Semantic Web and Peer-to-Peer

I need booking numbers for South India 2003

Do you have booking numbers for South India

2003?

Do you need booking numbers for South India

2003?

Do you need booking numbers for South India

2003?

Do you need booking numbers for South India

2003?

EU IST SWAPSemantic Web And

Peer-to-peer

Files, E-Mail, RelDB,...

Bookings in Chennai

Do you need booking numbers for South India

2003?

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© Steffen Staab 2004

Files, E-Mail, RelDB,...

Bookingsin Chennai

Semantic Knowledge Retrieval via Swapster

I need booking numbers for South India 2003

EU IST SWAPSemantic Web And

Peer-to-peer

Here is a file with booking numbers

for Chennai

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© Steffen Staab 2004

Advantages

Semantic Web-based Data Storage and Querying (RDF)

Very flexible platform

Peer-to-Peer Fault-tolerant network behaviour Only standard PCs

Runs now and still comprises many challenges

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Base Technology

Ontology Editing Environment (OntoEdit) Provide semantic underpinning

Ontology Learning Environment (Text-to-Onto) Facilitate ontology engineering

Ontology Storage, Reasoning, Querying (OntoBroker & KAON)

Deliver concepts and data

Semantic Middleware (KAON Server) Deliver concepts and data

Semi-automatic Semantic Annotation Tool (OntoMat-Annotizer) Provide semantic data

Peer-to-Peer Platform (Swapster) Personal information sharing

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Challenges

Studies

Case Study Virtual Organisation IBIT – Tourism on Mallorca;8 Organisations, 40 Peers

Case Study BibsterBibliography case study;Open-source roll-out planned for May 2004 with 100 Peers

!? German-Indo Case Study in Combination with Research Challenge !?

Some Research Challenges

Semantic ad-hoc Integration of Ontologies and Data

Duplicate Detection

Distributed Ontology Engineering

Ontology Learning

Multi-Lingual Ontologies

Multi-Lingual Information Retrieval

Semantic Query-Routing

...

„Which references do you have for ‚Staab 2005‘ ?“

Drop me an email if you‘d like to participate in the

Bibster case study in May!!

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© Steffen Staab 2004

Clustering

Erk lärung

Representation of docum ents

Hintergrund-w issen

Text Clustering with OK-Means

Oman granted term crude

[ICDM 2003; PKDD 2003]

Background Knowledge

DocumentsRepresentation of Documents

Explain

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© Steffen Staab 2004

WordNet as Ontology

144684 lexical entries

Rootentity

something

physical object

artifact

substance

chemical compound

organiccompound

lipid

oil

EN:oil

covering

coating

paint

oil paint

cover

cover with oil

bless

oil, anoint

EN:anoint EN:inunct

109377 Concepts (Synsets)

oil colorcrude oil

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Annotation for the Web

„Ask the Web what it can do for you!“ E.g. „Is Chennai a City?“

- Ask the Web for „the city of Chennai“- Ask the Web for „Chennai, the city“- Ask the Web for „Chennai is a city“- Ask the Web for „Cities like Chennai“

Aggregate results: you got it! (see WWW2004 results)

Further challenges along this line:- Multi-lingual retrieval- Multi-document retrieval (one document may not be

enough)- Annotation in communities (a „Hamburger“ in a fast

food restaurant is something different than an inhabitant of „Hamburg“)

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© Steffen Staab 2004

Other currently running projects at our research group

SEKT – Semantics-based KM

Acemedia – Multimedia Annotation

DotKom – Information Extraction

for KM

WonderWeb – Semantic Web Infrastructure

Halo – Dark MatterKnowledge Engineering

for the Sciences

DIP – Semantic Web Services

SemiPort – Semantic Portal

Technologies for Libraries...and some more....

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© Steffen Staab 2004

Thank you!

www.aifb.uni-karlsruhe.de/~sst www.ontoprise.de