semantic web - computer science department, cardiff …institute for advanced computer studies, um...
TRANSCRIPT
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WP 6 Metadata extraction
WP 3 Ontologies
www.geo-spirit.org
Semantic Web
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Semantic Web
Tim Berners Lee
Was wäre, wenn der Computer den
Inhalt einer Seite aus dem World Wide
Web nicht nur anzeigen, sondern auch
seine Bedeutung erfassen würde?
[Tim Berners-Lee, James Hendler,Ora Lassila]
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Wie?
- Ergänzung des bereits bestehenden WorldWide Web um Metadaten
- Wissensrepräsentation durch Ontologien
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Maus
Maus
Maus
Maus
Maus
Ontologien
Halter:Angelika Schmidt
Wohnort:Laboratorium
Name:Britney
Beruf:Sängerin
Mausmacher:WDR
Kategorie:Lach- und Sachgeschichten
Haltbarkeit:10 Jahre
Hersteller:logitech
gegründet:1981 – Apples, Schweiz
Hauptsitz:Fremont, Kalifornien
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Lebewesen
Ontologie der Lebewesen
Fische Säugetiere
NagetiereRaubtiere
Paarhufer
MehrzellerEinzeller
Wirbeltiere
Reptilien
Vögel Amphibien
Unpaarhufer
MausHamster Ratte
Meerschwein
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Filmkategorie
Ontologie der Trickfilmfiguren
menschliche Zeichentrickfiguren
Sendung mit der MausWalt Disney
Darsteller
übermenschliche Knetfiguren
Maus
Maulwurf
Elefant Ente
Käpt‘n Blaubär
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Möglichkeiten der Speicherung
1. Generierung des Schemas der Ontologieund Vermerk auf jeder web-page, daß derInhalt dieses Dokumentes der Semantik der Ontologie entspricht.
2. Generierung des Schemas der Ontologieund Anreicherung der Ontologie mit einzelnen Objekten=> riesiger Lagerplatz
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1. Marking up the web page<INSTANCE KEY="http://www.cs.umd.edu/users/hendler/"><USE-ONTOLOGY ID="cs-dept-ontology" VERSION="1.0" PREFIX="cs" URL=
"http://www.cs.umd.edu/projects/plus/SHOE/cs.html"><CATEGORY NAME="cs.Professor" FOR="http://www.cs.umd.edu/users/hendler/"><RELATION NAME="cs.member">
<ARG POS=1 VALUE="http://www.cs.umd.edu/projects/plus/"><ARG POS=2 VALUE="http://www.cs.umd.edu/users/hendler/">
</RELATION><RELATION NAME="cs.name">
<ARG POS=2 VALUE="Dr. James Hendler"></RELATION><RELATION NAME="cs.doctoralDegreeFrom">
<ARG POS=1 VALUE="http://www.cs.umd.edu/users/hendler/"><ARG POS=2 VALUE="http://www.brown.edu">
</RELATION><RELATION NAME="cs.emailAddress">
<ARG POS=2 VALUE="[email protected]"></RELATION><RELATION NAME="cs.head">
<ARG POS=1 VALUE="http://www.cs.umd.edu/projects/plus/"><ARG POS=2 VALUE="http://www.cs.umd.edu/users/hendler/">
</RELATION></INSTANCE>
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2. Scheme and entities stored together
Dept. of Computer Science, University of MarylandInstitute for Advanced Computer Studies, UMInstitute for Systems Research, UMDept. of Electrical Engineering, UMSemantic Web and Agents ResearchMaryland Information and Network Dynamics LaboratoryAdvanced Information Technology LaboratoryParalleL Understanding Systems LaboratoryAutonomous Mobile Robotics Laboratory
James A. Hendler
University of Maryland, Dept. of Computer ScienceBrown University, Providence, Rhode Island
Semantic Web and Agents ResearchMaryland Information and Network Dynamics LaboratoryAdvanced Information Technology LaboratoryParalleL Understanding Systems LaboratoryAutonomous Mobile Robotics Laboratory
Professor
member
name
doctoralDegreeFrom
emailAddress
head
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Ontologie in SPIRIT
Geometric TypeGeometric-Type-Name
Feature NameNameDateLanguageResource
Geographic Feature TypeFeature-Type-Name
0..*
0..*
+BT0..*BT-NT
+NT0..*
0..*
0..*
0..*RT
0..*
0..1
0..*
+USE0..1EQ
+UF0..*
Spatial RelationshipSpatial-OperatorRelatedFeatureID
Geographic FeatureFeature-IDDescription
1..1
+Standard-Name
1..1 1..*
+Footprint
1..*
0..* +Alternative-Names0..*
1..* +Feature-Type1..*
0..* +RelatedTO0..*
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ATKIS-Datenmodell – hierarchische Beziehungen
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Framework
“Lagerplatz”Ontologie
AnnotationInterpretation
Aufüllen der Ontologiemit extrahiertem Wissen
Anreicherungder web-pages
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Extraction of information in SPIRIT context
Extraction of geometric footprints, e.g.– Centroid of city– Extension of city
Extraction of spatial relations, e.g.– City close to river– Ski resort in black forest
Interpretation of spatial phenomena, e.g.– Big city– Recreational area
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Interpretation of spatial data – example
“Big city” – extract it from ATKIS data setCity – Object class “settlement”– Object “Ortslage”
Characteristics of a “big city”, e.g.– Size– Number of inhabitants– Has airport– Has public transportation network– ….
Use spatial analysis for combining thematic and spatial criteriaand assign a city as being a “big city”– E.g.: Big city, if
• Has size > XX km2• Has airport in vicinity of 5 km
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Hotel „Black Bear“
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Next tasks
Identification of basic spatial analysis/interpretation functions– Based on investigations from ontology WP
Implementation of these functions in a generic way
Extraction of information from spatial data sets based on given ontology– Use NMA-data sets as example– Automatically identify all SPIRIT-relevant information in a given
data set
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all over