Preparing for the Semantic Web

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Preparing for the Semantic Web

• Dr. Antonio M. Lopez, Jr.
• Department of Computer Sciences and
• Computer Engineering
• Xavier University of Louisiana
• One Drexel Drive, Campus Box 50
• New Orleans, LA 70125
• Voice 504.520.5248
• Fax [phone]
• Email tlopez_at_xula.edu
• WebPages www.xula.edu/tlopez

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Evolution
World Wide Web today B2B e-Business B2C
Web-commerce
Semantic Web tomorrow Ontology-based Intelligent
agent driven
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Research Influences

• Web Integration
• Frame-based Systems
• Description Logics

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Semantic Web Inroads
OWL
DAML OIL
DAML
RDFS
RDF
XML
HTML
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Example of Some Code
lt?xml version1.0 encodingiso-8859-1
?gt ltrdfRDF xmlnsrdfhttp//www.w3.org/1999/02/2
2-rdf-syntax-ns xmlnsrdfshttp//www.w3.org/2
000/01/rdf-schema xmlnsdamlhttp//www.daml.o
rg/2001/03/damloil gt   ltrdfDescription
abouthttp//www.w3.orggt ltPublishergt World
Wide Web Consortium lt/Publishergt lt/rdfDescription
gt   ltdamlClass rdfIDHumangt ltrdfslabelgtHuman
lt/rdfslabelgt lt/damlClassgt
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 ltdamlClass rdfIDMangt ltrdfssubClassOf
rdfresourceHuman/gt lt/damlClassgt   ltdamlClas
s rdfIDWomangt ltrdfssubClassOf
rdfresourceHuman/gt lt/damlClassgt   ltdamlClas
s rdfaboutHumangt ltdamldisjointUnionOf
rdfparseTypedamlcollectiongt ltdamlClass
rdfaboutMan/gt ltdamlClass
rdfaboutWoman/gt lt/damldisjointUnionOfgt lt/da
mlClassgt ltdamlClass rdfIDHumanBeinggt ltdaml
sameClassAs rdfresourceHuman/gt lt/damlClassgt
lt/rdfgt
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A picture is worth
Human
sameClassAs HumanBeing
XOR
subClassOf
subClassOf
Man
Woman
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Ontology
A logical theory that gives an explicit, partial
account of a conceptualization it is an
intentional semantic structure that encodes the
implicit rules constraining the structure of a
piece of reality. Guarino and Giaretta, 1995
Ontologies and Knowledge Bases Towards a
Terminological Classification
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e-Commerce
size
color
Shoe
brand
subClassOf
subClassOf
Boot
Moccasin
aPartOf
subClassOf
aPartOf
Heel
subClassOf
Sole
Dress_shoe
Sport_shoe
subClassOf
subClassOf
subClassOf
Jogging_shoe
Court_shoe
Walking_shoe
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Frame-based Approach to Knowledge Representation
name( Concept ). relation( Concept,
Relationship, Another_Concept ). slot( Concept,
Attribute ). value( Concept, Attribute,
What_it_is ).
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First-order logic
name(shoe). name(moccasin). name(dress_shoe). name
(sport_shoe). name(boot). name(jogging_shoe). name
(walking_shoe). name(court_shoe). name(heel). name
(sole). relation(moccasin, subClassOf,
shoe). relation(dress_shoe, subClassOf,
shoe). relation(sport_shoe, subClassOf,
shoe). relation(boot, subClassOf,
shoe). relation(jogging_shoe, subClassOf,
sport_shoe). relation(walking_shoe, subClassOf,
sport_shoe). relation(court_shoe, subClassOf,
sport_shoe). relation(heel, aPartOf,
shoe). relation(sole, aPartOf, shoe). slot(shoe,
size). slot(shoe, color). slot(shoe, brand).
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Verification of Ontological Structure
?- relation(What, aPartOf, Shoe).
Query
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Preparing for the Semantic Web

• Dr. Antonio M. Lopez, Jr.
• Department of Computer Sciences and
• Computer Engineering
• Xavier University of Louisiana
• One Drexel Drive, Campus Box 50
• New Orleans, LA 70125
• Voice 504.520.5248
• Fax [phone]
• Email tlopez_at_xula.edu
• WebPages www.xula.edu/tlopez