openhpi 2.7 - how much semantics is there in rdf(s)?

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Dr. Harald Sack

Hasso Plattner Institute for IT Systems Engineering

University of Potsdam

Spring 2013

Semantic Web Technologies

Lecture 2: Semantic Web - Basic Architecture I07: How Much Semantics Is There in RDF(S)?

Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam

2

Lecture 2: Semantic Web - Basic Architecture I

Open HPI - Course: Semantic Web Technologies


07 How much semantics is there in RDF(S)

Open HPI - Course: Semantic Web Technologies - Lecture 2: Semantic Web Basic Architecture I


How much knowledge (semantics) has RDF(S)

exv:SemanticWebTechnologies

exv:Lecture

rdf:type

exv:takes Place

exv:hasRoom

HS3

Tue 13.30-15.00

exv:hasDateSemantic Web Technologies

exv:hasName

exv:takesPlace exv:Event

rdf:type

rdfs:Class rdfs:Classrdf:Property

http://hpi-web.de/semanticweb/



How much knowledge (semantics) has RDF(S)


exv:Lecture

rdf:type

exv:takes Place

exv:hasRoom

HS3

Tue 13.30-15.00

exv:hasDateSemantic Web Technologies

exv:hasName


rdf:type


• The semantics of a term from an RDF(S) ontology is given in terms of its properties and its values (instances)




What Conclusions can we

deduce with RDF(S)?



exv:Lecture

exv:takes place



What conclusions can we deduce with RDF(S)?

rdfs:domain rdfs:range





exv:Lecture

exv:takes place



rdf:type

• Deduction of entity class membership from the domain of one of its properties







exv:Lecture

exv:takes place




rdf:type






exv:Lecture

exv:takes place




• Deduction of entity class membership from the range of one of its properties

rdf:typerdf:type






exv:Lecture

exv:takesPlace


rdfs:Class

rdfs:Classrdf:Property

rdf:type rdf:type

exv:Course

rdfs:subClassOf

rdfs:Class







exv:Lecture

exv:takesPlace


rdfs:Class


rdf:typerdf:type

exv:Course

rdfs:subClassOf

rdfs:Class

• Deduction of entity superclass membership froma class hierarchy.

rdf:type






exv:Alice

exv:Person

exv:isMotherOf

exv:isMotherOf exv:Person


rdf:type rdf:type

rdfs:Class

exv:isParentOf

rdf:Property

rdfs:subPropertyOf

exv:Person exv:Person

rdfs:Class

exv:Bob



rdfs:domain rdfs:rangerdfs:Class






exv:Alice

exv:Person

exv:isMotherOf

exv:isMotherOf exv:Person

rdfs:Class

rdf:Property

rdf:typerdf:type

rdfs:Class

exv:isParentOf

rdf:Property

rdfs:subPropertyOf

exv:Person exv:Person

rdfs:Class

exv:Bob

• Deduction of new facts from subproperty relationships

exv:Aliceexv:isParentOf

exv:Bob











Is RDF(S) sufficient for

Knowledge Representation

in the Semantic Web?

08 How to query RDF(S) ? - SPARQL

Open HPI - Course: Semantic Web Technologies - Lecture 2: Semantic Web Basic Architecture I

openhpi 2.7 - how much semantics is there in rdf(s)?

Documents

class rdfs

class exv

property rdfs

property exv

domain rdfs

event rdfs

course rdfs

type exv