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Vorstellung Forschungsgruppe
Agile Knowledge Engineering &
     Semantic Web (AKSW)
         Dr. Sören Auer
Research Group “Agile Knowledge
           Engineering and Semantic Web”
Founded 2006
Initially 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
                                   AKSW Vorstellung
  Web, I-Semantics, Scripting for The Semantic Web workshop series etc.
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 Engineering
Alumni
• Dr.-Ing. Muhammad Ahtisham Aslam, Ass. Prof. COMSATS Institute of Information Technology (CIIT),
   Lahore, Pakistan
Permanently ca. 10 student assistants, bachelor/master/diplom students
                                              AKSW Vorstellung
AKSW Funded Projects
SCMS: – 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., Netresearch
OntoWiki: – 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., Vakantieland
LE4SW - 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
    GmbH
SoftWiki: 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 GmbH
Vakantieland – Semantic Collaboration Platform for Tourist Information
• Industry / public funding; 36 months / 2006-2008
• Funding agency: SenterNovem (Dutch Ministry of Economic Affairs)
                                                AKSW Vorstellung
• Participants: Universität Leipzig, Vakantieland
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
Ausgewählte Partner und Projekte
Linke dGe o Data .o rg




                         AKSW Vorstellung
Semantic Leipzig




  Basic Research           Applied Research             Applied Research
 Applied Research        Technology Transfer          Product Development
                          Business Scenarios

Knowledge Management                   Semantic Web Infrastructure
Logical Foundations & Reasoning        Semantic Search
Service Engineering & Management       Social Software & Web 2.0
Machine Learning & Text Mining         eGovernment
                           AKSW Vorstellung
AKSW Linked Data Web Bausteine
DL-Learner                      OntoWiki
Machine Learning for            Collaborative creation of      Vakantieland
                                explicit knowledge via         Building Data Web applications
Ontologies
                                Semantic Wikis
                                                               SoftWiki
                                                               Distributed, stakeholder driven
OWLDB                           DBpedia                        Requirements Engineering
Extending DBs for ontology      “Semantification” of
handling / revealing implicit   Wikipedia
                                                               OpenResearch.org
information                                                    A semantic Wiki for the sciences


RDF Query Subsumption           Triplify                       xOperator
& View Maintenance              “Semantification” of (small)   Combining Instant Messaging
Scaling database backed         Web Applications               with the Data Web
Triple Stores
                                                                              …
Grundlagen                                                     Anwendungen
Marrying databases with RDF          Werkzeuge                 Bringing the Data Web to
and ontologies
                                                               end users
                                       AKSW Vorstellung
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 to
     correct mistakes
     (ant intelligence)
   – Activity can be
     watched and
     reviewed
   – Everything can
     be undone

                          AKSW Vorstellung
SoftWiki
 Problem: Requirements
 Engineering with large, spatially
 distributed stakeholder groups

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

 Application of text-mining
 methods for duplicate detection




Lohmann, Heim, Auer, Dietzold,
Riechert: Semantifying Requirements
Engineering – The SoftWiki Approach.
In I-SEMANTICS 2008.
                                       AKSW Vorstellung
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 partially
   funded by SenterNovem

                                 AKSW Vorstellung
OpenResearch.org – Semantic Wiki for the
Sciences
Based on SMW
Support for scientific
    content types
• Events (Conferences,
    Workshops, etc.)
• People, research
    groups, science
    genealogy
• Journals
• Funding calls
Additional categorization schemes include scientific field (not limited to CS) and
    location/region
Semantic 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/entities
                                    AKSW Vorstellung
xOperator–connecting IM & Data Web
Semantic overlay network for Instant messaging
Naturally solves some provenance, trust issues and
   context awareness




Dietzold, Unbehauen, Auer: xOperator - Interconnecting the Semantic Web and Instant
Messaging Networks. In ESWC 2008.
                                     AKSW Vorstellung
•    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)
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.
                                                  AKSW Vorstellung
Extraction Manager
Wikipedia
                               Extraction Job
 Update       Article-                                              Destinations
 Stream       Queue                         Extractors
                                                                    N-Triple                     N-Triple
                                 Label      Category      Image     Serializer
                                                                                                 Dumps
             PageCollections     Redirect       Disambiguation      SPARQL-
                                                                    Update
Wikipedia     Database          Abstract        Geo      Pagelink   Destination
Dumps         Wikipedia
                                         Generic Infobox
Wikipedia     Live
              Wikipedia             Mapping-based Infobox
OAI-PMH
                                                                                         Triple Store
                                                                                         Virtuoso
              Ontology-                     Parsers
              Mappings
                                  DateTime       Units      Geo

                                  String-List         Numbers




                         SPARQL endpoint                                           Linked Data



 The Web    DBpedia apps                 SPARQLVorstellung
                                            AKSW clients             RDF browser            HTML browser
Triplify




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

                                              AKSW Vorstellung
Triplify
                     Keyword-based
Web Browser                                         Semantic-based
                     Search Engines
                                                    Search Engines
              HTML pages
                                       RDF triple-based descriptions
                                       (Linked Data, RDF, JSON)

                      Webserver

                                                            Endpoint registry
   Web Application             Triplify script
                                                 Triplify

                                                             Configuration
                       Relational                             repository
                       Database
                              AKSW Vorstellung
LinkedGeoData.org
How to publish geo-data using Triplify?
                                  Lon            Lat RadiusAttribute Value

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


http://linkedgeodata.org/node/212331
http://linkedgeodata.org/node/944523
http://linkedgeodata.org/node/234091
http://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
Faceted Linked-Geo-Data Browser




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

                                                  AKSW Vorstellung
Portal
• Web app
• Cofundos.org
• Uses tagging/
  folksonomies,
  OpenID, RSS
  feeds, AJAX,
  REST,
  Semantic Web
  technologies
                  AKSW Vorstellung
AKSW Linked Data Web Bausteine
DL-Learner                      OntoWiki
Machine Learning for            Collaborative creation of      Vakantieland
                                explicit knowledge via         Building Data Web applications
Ontologies
                                Semantic Wikis
                                                               SoftWiki
                                                               Distributed, stakeholder driven
OWLDB                           DBpedia                        Requirements Engineering
Extending DBs for ontology      “Semantification” of
handling / revealing implicit   Wikipedia
                                                               OpenResearch.org
information                                                    A semantic Wiki for the sciences


RDF Query Subsumption           Triplify                       xOperator
& View Maintenance              “Semantification” of (small)   Combining Instant Messaging
Scaling database backed         Web Applications               with the Data Web
Triple Stores
                                                                              …
Grundlagen                                                     Anwendungen
Marrying databases with RDF          Werkzeuge                 Bringing the Data Web to
and ontologies
                                                               end users
                                       AKSW Vorstellung

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Overview AG AKSW

  • 1. Vorstellung Forschungsgruppe Agile Knowledge Engineering & Semantic Web (AKSW) Dr. Sören Auer
  • 2. Research Group “Agile Knowledge Engineering and Semantic Web” Founded 2006 Initially 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 AKSW Vorstellung Web, I-Semantics, Scripting for The Semantic Web workshop series etc.
  • 3. 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 Engineering Alumni • Dr.-Ing. Muhammad Ahtisham Aslam, Ass. Prof. COMSATS Institute of Information Technology (CIIT), Lahore, Pakistan Permanently ca. 10 student assistants, bachelor/master/diplom students AKSW Vorstellung
  • 4. AKSW Funded Projects SCMS: – 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., Netresearch OntoWiki: – 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., Vakantieland LE4SW - 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 GmbH SoftWiki: 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 GmbH Vakantieland – Semantic Collaboration Platform for Tourist Information • Industry / public funding; 36 months / 2006-2008 • Funding agency: SenterNovem (Dutch Ministry of Economic Affairs) AKSW Vorstellung • Participants: Universität Leipzig, Vakantieland
  • 5. 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
  • 6. Ausgewählte Partner und Projekte Linke dGe o Data .o rg AKSW Vorstellung
  • 7. Semantic Leipzig Basic Research Applied Research Applied Research Applied Research Technology Transfer Product Development Business Scenarios Knowledge Management Semantic Web Infrastructure Logical Foundations & Reasoning Semantic Search Service Engineering & Management Social Software & Web 2.0 Machine Learning & Text Mining eGovernment AKSW Vorstellung
  • 8. AKSW Linked Data Web Bausteine DL-Learner OntoWiki Machine Learning for Collaborative creation of Vakantieland explicit knowledge via Building Data Web applications Ontologies Semantic Wikis SoftWiki Distributed, stakeholder driven OWLDB DBpedia Requirements Engineering Extending DBs for ontology “Semantification” of handling / revealing implicit Wikipedia OpenResearch.org information A semantic Wiki for the sciences RDF Query Subsumption Triplify xOperator & View Maintenance “Semantification” of (small) Combining Instant Messaging Scaling database backed Web Applications with the Data Web Triple Stores … Grundlagen Anwendungen Marrying databases with RDF Werkzeuge Bringing the Data Web to and ontologies end users AKSW Vorstellung
  • 9. 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 to correct mistakes (ant intelligence) – Activity can be watched and reviewed – Everything can be undone AKSW Vorstellung
  • 10. SoftWiki Problem: Requirements Engineering with large, spatially distributed stakeholder groups Solution: comprehensive ontology for representing RE relevant knowledge + adapted OntoWiki application Application of text-mining methods for duplicate detection Lohmann, Heim, Auer, Dietzold, Riechert: Semantifying Requirements Engineering – The SoftWiki Approach. In I-SEMANTICS 2008. AKSW Vorstellung
  • 11. 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 partially funded by SenterNovem AKSW Vorstellung
  • 12. OpenResearch.org – Semantic Wiki for the Sciences Based on SMW Support for scientific content types • Events (Conferences, Workshops, etc.) • People, research groups, science genealogy • Journals • Funding calls Additional categorization schemes include scientific field (not limited to CS) and location/region Semantic 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/entities AKSW Vorstellung
  • 13. xOperator–connecting IM & Data Web Semantic overlay network for Instant messaging Naturally solves some provenance, trust issues and context awareness Dietzold, Unbehauen, Auer: xOperator - Interconnecting the Semantic Web and Instant Messaging Networks. In ESWC 2008. AKSW Vorstellung
  • 14. 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) 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. AKSW Vorstellung
  • 15. Extraction Manager Wikipedia Extraction Job Update Article- Destinations Stream Queue Extractors N-Triple N-Triple Label Category Image Serializer Dumps PageCollections Redirect Disambiguation SPARQL- Update Wikipedia Database Abstract Geo Pagelink Destination Dumps Wikipedia Generic Infobox Wikipedia Live Wikipedia Mapping-based Infobox OAI-PMH Triple Store Virtuoso Ontology- Parsers Mappings DateTime Units Geo String-List Numbers SPARQL endpoint Linked Data The Web DBpedia apps SPARQLVorstellung AKSW clients RDF browser HTML browser
  • 16. Triplify Auer, Dietzold, Aumueller, Lehmann, Hellmann: Triplify - Light-weight Linked Data Publication from Relational Databases. In WWW 2009. AKSW Vorstellung
  • 17. Triplify Keyword-based Web Browser Semantic-based Search Engines Search Engines HTML pages RDF triple-based descriptions (Linked Data, RDF, JSON) Webserver Endpoint registry Web Application Triplify script Triplify Configuration Relational repository Database AKSW Vorstellung
  • 18. LinkedGeoData.org How to publish geo-data using Triplify? Lon Lat RadiusAttribute Value http://linkedgeodata.org/near/48.213056,16.359722/1000/amenity=Hotel http://linkedgeodata.org/node/212331 http://linkedgeodata.org/node/944523 http://linkedgeodata.org/node/234091 http://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
  • 20. 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 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 AKSW Vorstellung
  • 21. 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 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. AKSW Vorstellung
  • 22. 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
  • 23. 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 Sören Auer: Endanwendergetriebene Open-source Softwareentwicklung mit Cofundos. In Open Source Jahrbuch 2008. AKSW Vorstellung
  • 24. Portal • Web app • Cofundos.org • Uses tagging/ folksonomies, OpenID, RSS feeds, AJAX, REST, Semantic Web technologies AKSW Vorstellung
  • 25. AKSW Linked Data Web Bausteine DL-Learner OntoWiki Machine Learning for Collaborative creation of Vakantieland explicit knowledge via Building Data Web applications Ontologies Semantic Wikis SoftWiki Distributed, stakeholder driven OWLDB DBpedia Requirements Engineering Extending DBs for ontology “Semantification” of handling / revealing implicit Wikipedia OpenResearch.org information A semantic Wiki for the sciences RDF Query Subsumption Triplify xOperator & View Maintenance “Semantification” of (small) Combining Instant Messaging Scaling database backed Web Applications with the Data Web Triple Stores … Grundlagen Anwendungen Marrying databases with RDF Werkzeuge Bringing the Data Web to and ontologies end users AKSW Vorstellung