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Page 1: Overview AG AKSW

Vorstellung Forschungsgruppe Agile Knowledge Engineering &

Semantic Web (AKSW)Dr. Sören Auer

Page 2: Overview AG AKSW

Research Group “Agile Knowledge Engineering and Semantic Web”

Founded 2006Initially hosted by the chair for Business Information Systems (Prof. Klaus-Peter

Fähnrich)

Now transition to Institute for Applied Informatics (InfAI)• An-institute at Universität Leipzig• Combines competences and resources of 8 University chairs from Computer

Science and Economics faculties as well as industry and sponsors

AKSW aims:• Contributing to the advancement of science in Semantic Web, Knowledge

Engineering, Software Engineering• Cost efficient, high-impact R&D, which proves usefulness at an early stage• Bridge the gap between research results and applications

AKSW actively educates students in Semantic Technologies and serves the community by (co-) organizing events such as Conference on Social Semantic Web, I-Semantics, Scripting for The Semantic Web workshop series etc.AKSW Vorstellung

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AKSW Team

• Dr. Sören Auer, Head, everything currently especially DBpedia, Cofundos, Triplify• Thomas Riechert, wiss. Mitarbeiter, Software Engineering and teaching• Jens Lehmann, doctoral student, DL-Learner, DBpedia, Machine Learning• Sebastian Dietzold, doctoral student, OntoWiki, xOperator, RDF-LDAP and Data integration• Axel Ngonga, doctoral student (2006), Text Mining, Knowledge Management• Thorsten Berger, doctoral student (2007), Software Engineering• Michael Martin, doctoral student (2008), Semantic Web Applications• Sebastian Hellmann, doctoral student (2008), Machine Learning• Jörg Unbehauen, doctoral student (2008), Software EngineeringAlumni• Dr.-Ing. Muhammad Ahtisham Aslam, Ass. Prof. COMSATS Institute of Information Technology (CIIT),

Lahore, PakistanPermanently ca. 10 student assistants, bachelor/master/diplom studentsAKSW Vorstellung

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AKSW Funded ProjectsSCMS: – Semantic Content Management Systems for Enterprise Knowledge Management and News Mining• Cooperative research project; 24 month / 2009-2011• Funding agency: Eurostars• Participants: Semantic Web Company, Digital Trowel, OpenLink Software Ltd., NetresearchOntoWiki: – Semantic Collaboration for Knowledge Management, E-Learning and E-Tourism• Cooperative research project; 24 month / 2008-2010• Funding agency: European Union FP7 / Research for the benefit of the SME program• Participants: OpenLink Software Ltd., Business Intelligence GmbH, B2 d.o.o., VakantielandLE4SW - Regionale Technologieplattform OntoWiki für soziale, semantische Kollaboration• Cooperative research project; 24 month / 2009-2011• Funding agency: BmbF (German Ministry for Education and Research), Programme “Regionale

Wachstumskerne / Potential”• Participants: Universität Leipzig, Business Intelligence GmbH, Netresearch GmbH & Co. KG, Ebrosia GmbHSoftWiki: End-user driven, distributed Requirements Engineering for agile Software Development• Cooperative research project; 42 months / 2006-2009• Funding agency: BmbF (German Ministry for Education and Research)• Participants: Universität Duisburg-Essen, T-Systems MMS, ProDV AG, LeCoS GmbH, QA Systems GmbH, ISA

Tools GmbHVakantieland – Semantic Collaboration Platform for Tourist Information• Industry / public funding; 36 months / 2006-2008• Funding agency: SenterNovem (Dutch Ministry of Economic Affairs)• Participants: Universität Leipzig, Vakantieland

AKSW Vorstellung

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Impact beyond the Scientific Community

DBpedia.org – knowledge extraction from Wikipedia• Impact: 300 posts about DBpedia in the Blogosphere (according to Technorati), ca. 100.000

visitors of the DBpedia website in 2007, on average 350 daily visitors. DBpedia became the most popular dataset used with Semantic Web applications and research prototypes and is for example extensively referred in official W3C standards such as RDFa.

Cofundos.org – open-source innovation and resource pooling• Impact: more than 10.000 visitors in Oct 2007, 62 Blog posts (according to Technorati), Cofundos

news announcements in major news channels (e.g. Heise.de, Golem.de, Linux.com), more than 300 registered users, 100 projects, 10k€ pledged donations.

OntoWiki.net – social, semantic collaboration platform• Impact: more than 8.000 downloads of the OntoWiki software (since 2004) / 773 in Sep 2007, on

average 3.000 monthly visitors of http://Ontowiki.net, users include SAP, OpenLink SW, T-Systems MMS, ProDV AG.

Triplify.org - “semantification” of Web applications• Impact: more than 1.000 visitors on the Triplify.org Website in the first week alone, Numerous

blog posts e.g. in the no 1 Web technology blog ReadWriteWeb, Triplify configurations for major Web applications such as Drupal, Joomla!, Wordpress, WackoWiki

AKSW Vorstellung

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Ausgewählte Partner und ProjekteLinkedGeoData.org

AKSW Vorstellung

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Semantic Leipzig

Knowledge ManagementLogical Foundations & ReasoningService Engineering & ManagementMachine Learning & Text Mining

Semantic Web InfrastructureSemantic SearchSocial Software & Web 2.0eGovernment

Applied ResearchTechnology TransferBusiness Scenarios

Applied ResearchProduct Development

Basic ResearchApplied Research

AKSW Vorstellung

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DBpedia“Semantification” of Wikipedia

AKSW Linked Data Web Bausteine

AKSW Vorstellung

Triplify“Semantification” of (small) Web Applications

OntoWikiCollaborative creation of explicit knowledge via Semantic Wikis

OWLDBExtending DBs for ontology handling / revealing implicit information

VakantielandBuilding Data Web applications

SoftWikiDistributed, stakeholder driven Requirements Engineering

GrundlagenMarrying databases with RDFand ontologies

WerkzeugeAnwendungenBringing the Data Web to end users

RDF Query Subsumption & View MaintenanceScaling database backed Triple Stores

xOperatorCombining Instant Messaging with the Data Web

OpenResearch.orgA semantic Wiki for the sciences

DL-LearnerMachine Learning for Ontologies

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The Semantic Data Wiki• Agile, distributed knowledge engineering• Not a Wiki with semantic extensions (Semantic MediaWiki,

IkeWiki), but an ontology editor using Wiki• Concepts:

– Make it easy tocorrect mistakes(ant intelligence)

– Activity can bewatched andreviewed

– Everything canbe undone

AKSW Vorstellung

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SoftWiki

AKSW Vorstellung

Problem: Requirements Engineering with large, spatially distributed stakeholder groups

Solution: comprehensive ontology for representing RE relevant knowledge + adapted OntoWiki application

Application of text-miningmethods for duplicate detection

Lohmann, Heim, Auer, Dietzold, Riechert: Semantifying Requirements Engineering – The SoftWiki Approach. In I-SEMANTICS 2008.

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Vakantieland*One of the largest tourist information sites in NL

(>100.000 daily page views, >20.000 points of interest)Traditional relational DB system was to inflexible to capture the increasingly

heterogeneous content types• Development of an OntoWiki based Data Web application• Geo-data integration from OpenStreetMaps• Semantic-Search• Integration of

DBpedia data• Comprehensive

performance tuning

* work with Ceriel Jakobs,Michael Martin partiallyfunded by SenterNovem

AKSW Vorstellung

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OpenResearch.org – Semantic Wiki for the SciencesBased on SMWSupport for scientific

content types• Events (Conferences,

Workshops, etc.)• People, research

groups, sciencegenealogy

• Journals• Funding callsAdditional categorization schemes include scientific field (not limited to CS) and

location/regionSemantic annotation and structuring of these facilitate search (e.g. SE conferences by

acceptance rate)Already one of the largest KB’s of science meta-information more than 7.000

pages/entitiesAKSW Vorstellung

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xOperator–connecting IM & Data WebSemantic overlay network for Instant messagingNaturally solves some provenance, trust issues and

context awareness

AKSW Vorstellung

Dietzold, Unbehauen, Auer: xOperator - Interconnecting the Semantic Web and Instant Messaging Networks. In ESWC 2008.

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• Knowledge base derived from Wikipedia• One of the largest ontologies• Multi-domain, multi-language• Joint work with FU Berlin and OpenLink• Extract RDF/OWL from Wikipedia, e.g. From

Infoboxes, categories, Geo-Coordinates, Images, ...• 274 million triples, 213.000 persons, 328.000

places, 57.000 music albums, 36.000 films, 20.000 companies

• 2500 manual mappings for infobox attributes to DBpedia Ontology (175 classes, 384 object properties, 336 data properties)

AKSW Vorstellung

Auer; Bizer, Lehmann, Kobilarov, Cyganiak, Ives: DBpedia: A Nucleus for a Web of Open Data. In ISWC 2007.Bizer, Lehmann, Kobilarov, Auer, Becker, Cyganiak, Hellmann: DBpedia - A Crystallization Point for the Web of Data. In Journal of Web Semantics, 2009.

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Extraction Job

Extraction Manager

PageCollections

Destinations

N-TripleDumps

WikipediaDumps

WikipediaOAI-PMH

Database Wikipedia

LiveWikipedia

N-TripleSerializer

SPARQL-UpdateDestination

Extractors

Generic Infobox

Label

Geo

Redirect Disambiguation

Image

Abstract Pagelink

Parsers

DateTime Units

Ontology-Mappings

Mapping-based Infobox

String-List Numbers

Geo

SPARQL endpoint Linked Data

The Web RDF browser HTML browserSPARQL clientsDBpedia apps

Triple StoreVirtuoso

UpdateStream

Article-Queue

Wikipedia

Category

AKSW Vorstellung

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Triplify

AKSW Vorstellung

Auer, Dietzold, Aumueller, Lehmann, Hellmann: Triplify - Light-weight Linked Data Publication from Relational Databases. In WWW 2009.

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Triplify

Relational Database

Web Browser Keyword-basedSearch Engines

Web Application

Semantic-basedSearch Engines

HTML pagesRDF triple-based descriptions(Linked Data, RDF, JSON)

Triplify script

Endpoint registry

Configuration repository

Webserver

Triplify

AKSW Vorstellung

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LinkedGeoData.orgHow to publish geo-data using Triplify?

http://linkedgeodata.org/near/48.213056,16.359722/1000/amenity=Hotel

http://linkedgeodata.org/node/212331http://linkedgeodata.org/node/944523http://linkedgeodata.org/node/234091http://linkedgeodata.org/way/56719

node/150760824 amenity "pub"; created_by "JOSM"; distance "5995";name "La friolera";geo#lat "40.4474";geo#long "-3.7173".

AKSW Vorstellung

Lon Lat RadiusAttribute Value

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Faceted Linked-Geo-Data Browser

AKSW Vorstellung

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Ontology Learning (DL-Learner)• Framework for Supervised

Machine Learning for OWL and Description Logics

• Application Areas:– “Classical” Machine Learning,

e.g. predicting Carcinogenesis– Ontology Engineering– recommendation/navigation

• Works on OWL Files and SPARQL Endpoints

• Supports different reasoner interfaces

• Accessible via command-line, GUI, web service

AKSW Vorstellung

Hellmann, Lehmann, Auer: Learning of OWL Class Descriptions on Very Large Knowledge Bases. International Journal On Semantic Web and Information Systems, 2009.Lehmann, Hitzler: Concept Learning in Description Logics. Machine Learning Journal, 2009

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Participatory Research Idea• Engaging the wisdom of the crowds for research

project definition and assessment• Outsource idea evaluation and progress review

to the stakeholder community• Organize research funding like an information

market – the best known instruments for aggregating (asymmetrically distributed) information

• Facilitate involvement of private endowments, foundations, individuals

AKSW Vorstellung

Auer, Braun-Thürmann: Towards Bottom-Up, Stakeholder-Driven Research Funding – Open Source Funding, Open Peer Review. In Peer Review Reviewed: The International Career of a Quality-control Instrument and New Challenges, 2008.

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Open Science Platform Concept• Research ideas: published by Researchers or SMEs on an open-science Web

platform as early as possible• Project definition:

– All participants of the platform, i.e. researchers and stakeholders (e.g. SMEs, NGOs) are equipped with a virtual cash budget for pledging

– Stakeholders comment on the ideas, add requirements and pledge a certain amount of money they would be willing to “pay” for a successful realization.

• Selection: A funding agency can select and fund the highest ranked proposals in a certain area or application domain

• Project runs: involved investigators report publicly (e.g. Weblog) => enables stakeholders to influence the projects (e.g. changed requirements or alternative approaches appear)

• Results are published, everybody is invited to comment on the success, only the stakeholders (i.e. those who pledged) are eligible to vote about the success / write an evaluation report (publically available => track record of a researcher)

AKSW Vorstellung

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Cofundos.org• Application of the concept for open-

source software development• Funding is provided by individuals• Stakeholder community interested in a

certain software (feature) decides collaboratively about requirements, who to entrust, project success

• All contributions licensed under Creative Commons

• Based on: Reputation & community, fairness & trust, open-knowledge & open source, iterative methodology

AKSW Vorstellung

Sören Auer: Endanwendergetriebene Open-source Softwareentwicklung mit Cofundos. In Open Source Jahrbuch 2008.

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Portal

• Web app• Cofundos.org• Uses tagging/

folksonomies,OpenID, RSSfeeds, AJAX,REST,Semantic Webtechnologies

AKSW Vorstellung

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DBpedia“Semantification” of Wikipedia

AKSW Linked Data Web Bausteine

AKSW Vorstellung

Triplify“Semantification” of (small) Web Applications

OntoWikiCollaborative creation of explicit knowledge via Semantic Wikis

OWLDBExtending DBs for ontology handling / revealing implicit information

VakantielandBuilding Data Web applications

SoftWikiDistributed, stakeholder driven Requirements Engineering

GrundlagenMarrying databases with RDFand ontologies

WerkzeugeAnwendungenBringing the Data Web to end users

RDF Query Subsumption & View MaintenanceScaling database backed Triple Stores

xOperatorCombining Instant Messaging with the Data Web

OpenResearch.orgA semantic Wiki for the sciences

DL-LearnerMachine Learning for Ontologies


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