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Semantic Technologies: Diamond in the Rough?

Unik Graduate Research Center

22.05.07

Dr. Juan Miguel Gomez

Universidad Carlos III de Madrid

Semantic Technologies: Diamond in the Rough? 2/25

Content

Why Semantics? Semantics in a nutshell Semantics in Business: Show me the Money Identity 3.0: Semantics + Identity

Management Conclusions

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Why Semantics?

Syntax vs. Semantics

What do the tags mean for the machine?

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Why Semantics?

Conceptual Level

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The General Vision

Static

500 million user more than 3 billion pages

WWWURI, HTML, HTTP

Syntactic

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The General Vision

WWWURI, HTML, HTTP

Serious Problems in Information finding Information extracting Information representing Information interpreting Information maintaining

Semantic WebRDF, RDF(S), OWL

Static

Syntactic Semantic

Semantic Technologies: Diamond in the Rough? 7/25

Static WWWURI, HTML, HTTP

Bringing the web Bringing the web to its full potentialto its full potential

Semantic WebRDF, RDF(S), OWL

Dynamic Web ServicesUDDI, WSDL, SOAP

Intelligent WebServices

Semantic Web Services

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Semantic Web Pyramid

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Resource Description Framework (RDF)

W3C recommendation (http://www.w3.org/RDF) RDF is graphical formalism ( + XML syntax + semantics)

for representing metadata for describing the semantics of information in a machine- accessible way

RDF is a basic ontology language Resources are described in terms of properties and property values using

RDF statements. Statements are represented as triples, consisting of a subject, predicate and

object. [S, P, O]

Josef UniKhasAffiliation

http://www.unik.no

hasHomePage

Josef NollhasName

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Resource Description Framework (RDF)

W3C recommendation (http://www.w3.org/RDF) RDF is graphical formalism ( + XML syntax + semantics)

for representing metadata for describing the semantics of information in a machine- accessible way

RDF is a basic ontology language Resources are described in terms of properties and property values using

RDF statements. Statements are represented as triples, consisting of a subject, predicate and

object. [S, P, O]

Josef UniKhasAffiliation

http://www.unik.no

hasHomePage

Josef NollhasName

Semantic Technologies: Diamond in the Rough? 11/25

Web Ontology Language (OWL)

Built on top of RDF(S) and renaming DAML+OIL primitives

Three layers: OWL Lite: a small subset, easier for frame-based tools to

transition to, easier reasoning OWL DL: description logic, decidable reasoning OWL Full: RDF extension, allows meta-classes

Several syntaxes: Abstract syntax: easier to read and write manually, closely

corresponds to DL RDF/XML: OWL can be parsed as an RDF document, more

verbose

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Semantics in Business: Knowledge Management Enable a paradigm switch in searching

information From

Information Retrieval To

Question Answering

This presentation illustrates an application in this line for one particular domain

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Semantic Technologies: Diamond in the Rough? 14/25

Virtual Archive: Federico García Lorca

Spain member Organizations

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The Potential of Semantic Web Technology Enable a paradigm switch in searching

information From

Information Retrieval To

Question Answering

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Federico García Lorca

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Enterprise Application Integration: SUPER (SAP-IBM)

O

O’

M

The amount of the order must at least be

100€

A

B

C

Business RepresentationBusiness Representation

assign send

xM: …

IT RepresentationIT Representation

Here is my business process!

Wow! This is perfect – nothing left to do for me!

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Enterprise Application Integration

Process Modeling

Function/Service

Repository

Process Repository

SWSRepository

Deriv

ing o

r Add

Sem

an

tic A

nnota

tions

sBPMLangua

ge

sBPMRepository

Process Execution

Execution History

Instance Data

Mining

Monitoring

Semantic Query Processor

A1

A2

A3

A5

A4 !

Semantic Matching

SemanticMatching

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B2B: SWWS (HP Labs- DERI)

Message

Ontology

Interface

Invocation

Mediation

Hewlett-Packard Cisco Systems

SAPERPSystem

Baan ERPSystem

CRMSystem

Special Thanks to Christoph Bussler for this slide

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SemID: Combining Identity Management with Semantics

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Identity Management

Identity Social Identity Personal Identity Corporate Identity

Role Group Policy

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SemID Ontology

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Reasoning

Using the approach presented by the James Hendler paper, implement of top of Pellet reasoning

Policies as levels of visibility Subsumption used to verify which policies are

eligible

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Conclusions

There remains loads to be done in terms of Semantics being applied to the business world

Special thanks to Prof. Josef Noll who gave me the opportunity to visit UniK

Q&A