Utilizing Federated Knowledge in Semantic Web Applications

Demonstration for ICSC 2008

Jans Aasman Ph.D.

Franz Inc

ja@franz.com

Abstract

Your future knowledge store will be a collection

that lives in-memory, on your local hard disk, on your

intranet and/or distributed on the global web. It will be

a collection of inter-related triple-stores federated into

an ever-changing whole. We will demonstrate a

flexible architecture for creating 'federated knowledge

stores' on the fly that allow for transparent RDFS++

reasoning and SPARQL queries. We will demonstrate

this new architecture with billions of triples from

distributed sources including the Census database, the

DBPedia, Wordnet, Geonames and the Enron e-mail

corpus in an RDF federation.

1. Introduction

This demonstration will educate participants on how

to create a flexible federated architecture that allows

them to create ‘federated stores’ on the fly that allow

for transparent RDFS++ reasoning and SPARQL over

these federated stores. This federated architecture will

work for stores that are on the same machine, stores in

the same data warehouse or stores that are

geographically dispersed.

2. Outline

� Semantic Web and Why.

� Loading a Billion Plus Triples

� Why we need Federation

� Data Growth

� More Knowledge in RDF

� Query Design

� Query Optimization

� Managing Scalability and Speed

3. Scope

This Demonstration will show users how to load,

manage and query over billions of RDF statements.

ICSC identified an area of interest for 2008 - Semantic

Database Theory and Systems. This Demonstration

specifically addresses the question of scalability for

Semantic Web applications by demonstration of

realistic scenarios using publicly available data sets.

4. Presenter Bio

Jans Aasman started his career as an experimental

and cognitive psychologist, earning his Ph.D in

cognitive science with a detailed model of car driver

behavior using Lisp and Soar. He has spent most of his

professional life in telecommunications research,

specializing in intelligent user interfaces and applied

artificial intelligence projects. From 1995 to 2004 he

was also a part-time professor in the Industrial Design

department of the Technical University of Delft. Jans

is currently the CEO of Franz Inc., the leading supplier

of commercial, persistent and scalable RDF database

products that provide the storage layer for powerful

reasoning and ontology modeling capabilities for

Semantic Web applications.

The IEEE International Conference on Semantic Computing

978-0-7695-3279-0/08 $25.00 © 2008 IEEE

DOI 10.1109/ICSC.2008.32

495

The IEEE International Conference on Semantic Computing

978-0-7695-3279-0/08 $25.00 © 2008 IEEE

DOI 10.1109/ICSC.2008.32

486

5. References

[1] 1st Scientific American article on the Semantic

Web,

http://www.sciam.com/article.cfm?articleID=00048

144-10D2-1C70-84A9809EC588EF21&ref=sciam

[2] DBPedia, http://www.dbpedia.org

[3] Event Ontology,

http://motools.sourceforge.net/event/event.html

[4] The Friend of a Friend Project, http://www.foaf-

project.org/

[5] GeoNames Data Access,

http://www.geonames.org/export/

[6] US Census Data in RDF,

http://www.rdfabout.com/demo/census/

[7] Wordnet, http://wordnet.princeton.edu/

[8] Mika, P.: Social Networks and the Semantic Web.

Springer (2007)

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