1 / 27

MSc Database Systems - Research Topics 2007

MSc Database Systems - Research Topics 2007. 2007-03-20 David George. Research Focus. Data and Information Integration Semantic Web - XML/RDF (W3C) Ontology (OWL) - focusing on Geographic Applications. Semantic Web.

heinz
Download Presentation

MSc Database Systems - Research Topics 2007

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MSc Database Systems- Research Topics 2007 2007-03-20 David George

  2. Research Focus • Data and Information Integration • Semantic Web - XML/RDF (W3C) • Ontology (OWL) - focusing on Geographic Applications

  3. Semantic Web • A project aimed to make web pages machine understandable. “An extension of the current Web, … information given well-defined meaning, …enabling computers and people to work in co-operation” (Berners-Lee et al, 2001) • A universal medium for information exchange; where Ontologies (formal taxonomies) provide meaning or semantics.

  4. Ontologies in Computing • “An Ontology is a formal, explicit specification of a shared conceptualization” • (Gruber, 1993 & Borst, 1997). • Define the vocabulary of a “Domain” • concepts and their attributes • relationships between concepts • constraints on those relationships

  5. Semantic Web DE BRUIJN, J. (2003) Using Ontologies - Enabling Knowledge Sharing and Reuse on the Semantic Web [online]. DERI – Digital Enterprise Research Institute. Available from: http://www.deri.ie/publications/techpapers/documents/DERI-TR-2003-10-29.pdf. [Accessed 5 March 2007].

  6. Biblio-Thing Document Book Doctoral-Thesis Newspaper Journal Master-Thesis Magazine A Bibliographic Ontology Agent Person Organisation Author Thesis Publisher University Periodical-Publication A useful source for ontologies: http://protege.cim3.net/cgi-bin/wiki.pl?ProtegeOntologiesLibrary

  7. Ontology: “Geo-Layers” Transportation Tourism

  8. GeographicOntology:Land-based Transport

  9. Ontology Design: Best Practice Ontology elements can be described as: • Primitives: self-standing entities (objects/forms) e.g. Structure, Bridge, Process, System • Relations: “concept-linking” properties e.g. X hasRole Y • Roles: functions e.g. RailTransportRole and • Definables: where we define dependent concepts by combining Primitives, Relations, and Roles e.g: • RailwayBridge≡ (hasForm∃Structure)⊓ • (hasRole∃RailTransportRole)

  10. TransportationConcept TransportationConcept Is-a Is-a hasRole hasRole Is-a Is-a Is-a Is-a Is-a Is-a hasRole hasRole Is-a Is-a hasRole hasRole hasFacility hasFacility accessedBy accessedBy servesLocation servesLocation servesLocation servesLocation hasFacility hasFacility accessedBy accessedBy hasFacility hasFacility hasFacility hasFacility hasFacility hasFacility Transportation World: Mappings

  11. Land-based Transport

  12. M6 M67 A6 Transportation World: Domain

  13. M6 M67 A6 Transportation World: Layers

  14. Railway World: Conceptualisation

  15. Railway World: Specification

  16. Railway World: Development

  17. Rail Transportation RailTransportComponent RailPassenger Route RailFreight Route startsFrom endsAt RailStation RailFreight Terminal hasRailComponent hasRailRole RailTransportSystem RailFreight System hasRailRole RailTransportRole RailFreight TranspRole RailPassenger System RailPassenger TranspRole

  18. Road Transportation startsFrom RoadTransportComponent Motorway Junc endsAt Motorway hasRoadComponent hasRoadRole RoadTransportRole hasRoadRole RoadTransportSystem HighSpeed Network Motorway System Orbital Role A-Road System HighSpeed RouteRole

  19. Population Groups locatedIn PopulationGroupComponent County locatedIn Town City hasCommunityRole PopulationGroupRole Dormitory TownRole Regional AdminRole hasCommunityRole

  20. Land-Transportation PopulationGroupComponent City hasCommuterFacility County passesThrough Town PopulationGroupRole RailTransportComponent Dormitory TownRole RailStation RailFreight Route Regional AdminRole hasFreightOperation RailPassenger Route RailFreight Terminal RailTransportRole accessedVia RailTransportSystem RailFreight TranspRole RailFreight System hasTransportInfrastructure RailPassenger TranspRole RailPassenger System integratedWith RoadTransportRole HighSpeed RouteRole hasCompetion HighSpeed Network Orbital Role RoadTransportComponent RoadTransportSystem Motorway System Motorway Junc A-Road System Motorway

  21. PopulationGroupComponent City County Town PopulationGroupRole RailTransportComponent Dormitory TownRole RailStation RailFreight Route Regional AdminRole RailPassenger Route RailFreight Terminal RailTransportRole RailTransportSystem RailFreight TranspRole RailFreight System RailPassenger TranspRole RailPassenger System RoadTransportRole HighSpeed RouteRole HighSpeed Network Orbital Role RoadTransportComponent RoadTransportSystem Motorway System Motorway Junc A-Road System Motorway Foundation Ontology Mapping Entity Physical Abstract Object Process Quantity Region SelfConnectedObject Motion Number GeographicArea CorpuscularObject Translocation RailwayPunctuality LandArea Artifact Transportation City Device RailPassenger Transportation TransportationDevice TransportSystem

  22. Ontology: Railway Transportation

  23. Ontology: Railway Transportation

  24. Ontology: Railway Transportation

  25. Geo-Layers Research • Any questions?

  26. RDF Example Object, Attribute, Value triple: Often stated as: Predicate (subject, object)

  27. a a a a a a Semantic (Shadow) Web

More Related