1. The Semantic Web Part 6. RDF Vocabularies: RDF Schema
Dr. Myungjin Lee

2. Ability to Define the Vocabularies
This is a property, and it indicates person’s name.
<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="
xmlns:s="
<rdf:Description rdf:about="
<s:name>Myungjin Lee</s:name>
</rdf:Description>
<rdf:Description rdf:about="
<s:name>John Mayer</s:name>
<rdf:Description rdf:about="
<s:name>Tim Berners-Lee</s:name>
</rdf:RDF>
These resources are person.

3. RDF Vocabularies: RDF Schema
a set of classes with certain properties using the RDF extensible knowledge representation language
providing basic elements for the description of ontologies
The resources in the RDF Schema vocabulary have URIrefs with the prefix (conventionally associated with the QName prefix rdfs:).
W3C Recommendation 10 February 2004
RDF Schema allows:
definition of classes and class instantiation
definition of properties and simple restrictions
definition of hierarchies of classes and properties

4. Describing Classes Class Vocabularies for describing classes
"kinds of things“, the generic concept of a Type or Category
Vocabularies for describing classes
rdfs:Class
the class of resources
rdfs:Resource
all things described by RDF are called resources, and are instances of the class rdfs:Resource.
rdf:type
to state that a resource is an instance of a class
rdfs:subClassOf
to state that all the instances of one class are instances of another

5. A Vehicle Class Hierarchy
rdfs:Resource
ex:PassengerVehicle
rdfs:Class
ex:Truck
ex:MiniVan
ex:Van
ex:MotorVehicle
rdf:type
exthings:companyCar
rdfs:subClassOf

6. A Vehicle Class Hierarchy
rdfs:Resource
ex:PassengerVehicle
rdfs:Class
ex:Truck
ex:MiniVan
rdfs:subClassOf
ex:Van
ex:MotorVehicle
rdf:type
rdf:type
exthings:companyCar
rdfs:subClassOf
inferred triple

7. ex:PassengerVehicle rdfs:Class ex:MiniVan ex:Truck ex:Van
ex:MotorVehicle rdf:type rdfs:Class .
ex:PassengerVehicle rdf:type rdfs:Class .
ex:Van rdf:type rdfs:Class .
ex:Truck rdf:type rdfs:Class .
ex:MiniVan rdf:type rdfs:Class .
ex:PassengerVehicle rdfs:subClassOf ex:MotorVehicle .
ex:Van rdfs:subClassOf ex:MotorVehicle .
ex:Truck rdfs:subClassOf ex:MotorVehicle .
ex:MiniVan rdfs:subClassOf ex:Van .
ex:MiniVan rdfs:subClassOf ex:PassengerVehicle .
<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="
xmlns:rdfs="
xml:base="
<rdfs:Class rdf:ID="MotorVehicle"/>
<rdfs:Class rdf:ID="PassengerVehicle">
<rdfs:subClassOf rdf:resource="#MotorVehicle"/>
</rdfs:Class>
<rdfs:Class rdf:ID="Truck">
<rdfs:Class rdf:ID="Van">
<rdfs:Class rdf:ID="MiniVan">
<rdfs:subClassOf rdf:resource="#Van"/>
<rdfs:subClassOf rdf:resource="#PassengerVehicle"/>
</rdf:RDF>
ex:PassengerVehicle
rdfs:Class
ex:MiniVan
ex:Truck
ex:Van
ex:MotorVehicle

8. Describing Properties
Vocabularies for describing properties
rdf:Property
the class of RDF properties
rdfs:subPropertyOf
to state that all resources related by one property are also related by another
rdfs:domain
to state that any resource that has a given property is an instance of one or more classes
rdfs:range
to state that the values of a property are instances of one or more classes

9. Properties of Vehicle Schema
rdf:type
rdfs:range
rdfs:domain
rdfs:subPropertyOf
rdfs:subClassOf
ex:Person
ex:registeredTo
ex:MotorVehicle
rdfs:Class
ex:driver
rdf:Property
ex:primaryDriver
rdfs:Datatype
xsd:integer
ex:rearSeatLegRoom
ex:PassengerVehicle

10. Properties of Vehicle Schema
rdf:type
rdfs:range
rdfs:domain
rdfs:subPropertyOf
rdfs:subClassOf
infered triple
ex:Person
ex:registeredTo
ex:MotorVehicle
rdfs:Class
ex:driver
rdfs:domain
rdf:Property
ex:primaryDriver
rdfs:domain
rdfs:Datatype
xsd:integer
ex:rearSeatLegRoom
ex:PassengerVehicle

11. An Instance of Vehicle Schema
rdf:type
rdfs:range
rdfs:domain
rdfs:subPropertyOf
rdfs:subClassOf
infered triple
ex:Person
ex:registeredTo
ex:MotorVehicle
rdf:Property
ex:driver
ex:primaryDriver
ex:PassengerVehicle
ex:registeredTo
ex:primaryDriver
exthings:staff85740
exthings:johnSmithsCar
exhings:JohnSmith

12. An Instance of Vehicle Schema
rdf:type
rdfs:range
rdfs:domain
rdfs:subPropertyOf
rdfs:subClassOf
infered triple
ex:Person
ex:registeredTo
ex:MotorVehicle
rdf:Property
ex:driver
ex:primaryDriver
ex:PassengerVehicle
rdf:type
rdf:type
ex:registeredTo
ex:primaryDriver
exthings:staff85740
exthings:johnSmithsCar
exhings:JohnSmith
ex:driver

13. TBox and ABox TBox ABox "terminological component"
a conceptualization associated with a set of facts
ABox
"assertion component"
a fact associated with a terminological vocabulary within a knowledge base

14. TBox and ABox TBox ABox rdf:type rdfs:range rdfs:domain
rdfs:subPropertyOf
rdfs:subClassOf
infered triple
ex:Person
ex:registeredTo
ex:MotorVehicle
rdf:Property
ex:driver
ex:primaryDriver
ex:PassengerVehicle
rdf:type
rdf:type
TBox
ABox
ex:registeredTo
ex:primaryDriver
exthings:staff85740
exthings:johnSmithsCar
exhings:JohnSmith
ex:driver

15. Other Vocabularies rdfs:label rdfs:comment rdfs:seeAlso
to provide a human-readable version of a resource's name
rdfs:comment
to provide a human-readable description of a resource
rdfs:seeAlso
to indicate a resource that might provide additional information about the subject resource
rdfs:isDefinedBy
to indicate a resource defining the subject resource
<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="
xmlns:kdc="
xmlns:rdfs="
<kdc:StateDesignatedHeritage rdf:about="
<rdfs:label xml:lang="ko">남대문</rdfs:label>
<rdfs:label xml:lang="en">Namdaemun</rdfs:label>
<rdfs:seeAlso rdf:resource="
<rdfs:comment>국보 1호</rdfs:comment>
</kdc:StateDesignatedHeritage>
</rdf:RDF>

16. Structure of RDF Vocabularies

17. References http://www.w3.org/TR/2004/REC-rdf-primer-20040210/

18. Thanks for your attention. Dr. Myungjin Lee e-Mail : mjlee@li-st.com
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