1. Sheet 10
RDF (2)

2. This mechanism for describing resources is a major component in what is proposed by the W3C's Semantic Web activity: an evolutionary stage of the World Wide Web in which automated software can store, exchange, and use machine-readable information distributed throughout the web, in turn enabling users to deal with the information with greater efficiency and certainty.
Cited from Wikipedia

3. The principle of inference in RDF/semantic web is the ability to derive new data from data that you already know.
Example:
If Human is subClassof Mortal
then
if Sokartes is a Human,
he is also a Mortal

5. <?xml version='1.0' encoding='UTF8'?>
<!DOCTYPE rdf:RDF [
<!ENTITY rdf '
<!ENTITY rdfs '
<!ENTITY movie '
]>
<rdf:RDF xmlns:rdf="
xmlns:rdfs="
xmlns:movie="
xml:base="
<rdfs:Class rdf:about="#Person"/>
<rdfs:Class rdf:about="#Movie"/>
<rdfs:Class rdf:about="#Director">
<rdfs:subClassOf rdf:resource="#Person"/>
</rdfs:Class>
<rdfs:Class rdf:about="#Actor">

6. <rdf:Property rdf:about="#name">
<rdfs:domain rdf:resource="#Person"/>
<rdfs:range rdf:resource="&rdfs;Literal"/>
</rdf:Property>
<rdf:Property rdf:about="#title">
<rdfs:domain rdf:resource="#Movie"/>
<rdf:Property rdf:about="#directs">
<rdfs:domain rdf:resource="#Director"/>
<rdfs:range rdf:resource="&rdf;Bag"/>
<rdf:Property rdf:about="#stars">

7. <rdf:Description rdf:type=“#Director“ rdf:about=“#jackson”>
<movie:directs>
<rdf:Bag>
<rdf:li resource="#fellowship"/>
</rdf:Bag>
</movie:directs>
<movie:name>Peter Jackson</movie:name>
</rdf:Description>
<movie:Actor rdf:about="#wood" movie:name="Elijah Wood"/>
<movie:Actor rdf:about="#mckellan" movie:name="Ian McKellan">
<movie:Movie rdf:about="#fellowship"
movie:title="The Fellowship of the Ring">
<movie:stars>
<rdf:li resource="#wood"/>
<rdf:li resource="#mckellan"/>
</movie:stars>
</movie:Movie>
</rdf:RDF>

10. CEO Board Person Employee PM Company ITCompany Marketing
@prefix rdf: < .
@prefix rdfs: < .
@prefix : <#> .
:Company rdf:type rdfs:Class.
:Person rdf:type rdfs:Class.
:MarketingCompany rdf:type rdfs:Class ;
rdfs:subClassOf :Company .
:ITCompany rdf:type rdfs:Class ;
:Employee rdf:type rdfs:Class ;
rdfs:subClassOf :Person .
:ProjectManager rdf:type rdfs:Class .
rdfs:subClassOf :Employee .
:CEO rdf:type rdfs:Class ;
rdfs:subClassOf :BoardMember ;
:BoardMember rdf:type rdfs:Class ;
:located rdf:type rdf:Property ;
rdfs:domain :Company ;
rdfs:range xs:string.
:hasName rdf:type rdf:Property ;
rdfs:domain :Person ;
rdfs:range xs:string .
:employed rdf:type rdf:Property ;
rdfs:range :Company .
Company
ITCompany
Marketing
Person
Employee PM
Board
CEO

11. SPARQL ARQ Download Jena, ARQ Set up your environment to use Jena ARQ
Download Cygwin (optionally)