Transcript cmpe 588 engineering the semantic web information system

EASTERN MEDITERRANEAN UNIVERSITY
COMPUTER ENGINEERING DEPARTMENT
CMPE 588 ENGINEERING THE SEMANTIC WEB
INFORMATION SYSTEM
ONTOLOGY-DRIVEN SEMANTIC
MARK UP OF UNSTRUCTURED
TEXTS
Faaya H. Tiwuya
Instructor: Assoc. Prof.
Dr. Atilla ELCI
OUTLINE
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Introduction
Defination of terms
Need to use ontologies
Annotation tools
Project Tools
Ontology driven semantic mark up/annotation process
Sample Semantic Mark up
Querying knowledge base
OUTLINE
• Conclusion
• References
• Questions
INTRODUCTION
• A recent estimates by Merrill Lynch states that
more than 85% of all business information
exists as unstructured data
• In order to realise the goal of the Semantic Web
which is to allow machines share and exploit
knowledge without central authority, there is a
need to mark up this bulk of data in a way that
machines will be able to read them
INTRODUCTION
• Blogs are a typical example of information that
exists in an unstructured format.
• There is a need therefore to mark-up blog sites
within the context of an “ontology” so that that
meaningful information can be extracted from
them for the population of a knowledge base
for retrieval at a later time by different
applications.
DEFINATION OF TERMS
• What then is a blog, ontology and semantic
annotation?
– Blogs: A blog is a website where entries are written
in a chronological order and displayed in reverse
chronological order. Blogs provide commentary or
news on a particular subject such as food, politics, or
local news.
DEFINATION OF TERMS
• Ontology: An ontology is a data model that represents
a set of concepts within a domain and the relationships
between those concepts.
– It is used to reason about the objects within that domain.
• Annotation: Annotation is the process of marking up
or adding notes/comments to something. Within the
context of the semantic web, it is the process of
marking up documents with meaningful tags
NEED TO USE ONTOLOGIES
• Why do we need to use ontologies?
– To share common understanding of the structure of
information among people or software agents
– To enable reuse of domain knowledge
– To make domain assumptions explicit
– To separate domain knowledge from the operational
knowledge
– To analyze domain knowledge
ANNOTATION TOOLS
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SHOE Knowledge Annotator
Annotea
SMORE
Semantic Word
KIM Semantic Annotation Platform
MnM
– MnM is an annotation tool which provides both automated
and semi-automated support for annotating web pages with
semantic contents. MnM integrates a web browser with an
ontology editor and provides open APIs to link to ontology
servers and for integrating information extraction tools.
PROJECT TOOLS
• MnM
• TinyXml
• C++ BUILDER 5.0
ONTOLOGY DRIVEN SEMANTIC
ANNOTATION PROCESS
A CELEBRITY IS A PERSON
• A celebrity “is a” person who is famous ( not for
something infamous ) and attracts a lot of media
attention. E.g David Beckham, Angelina Jolie,
Zinedane Zidane.
• Sites exists where people post comments about
these sort of people almost o a daily basis.
• Some of these sites contain important
information.
A CELEBRITY IS A PERSON
SAMPLE ONTOLOGY –DRIVEN SEMANTIC
MARKUP ON A DAVID BECKHAM BLOGUSING
MnM
XML FILE ON BECKHAM MARK-UP
SAMPLE QUERY FOR INFO ON
BECKHAM USING CELEBQRY
SAMPLE QUERY FOR INFO ON
BECKHAM USING CELEBQRY
CONCLUSION
• Blogs contain a lot of valuable information
about different topics
• An otology driven semantic annotation of these
blogs will create a unified means to share the
wealth of information these blogs possess.
REFERENCES
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Prof. Dr. Atilla Aelci, Lecture slides CMPE 588 Engineering Semantic Web
information Systems.
Ontology Development 101: A Guide to Creating Your First Ontology
Natalya F. Noy and Deborah L. McGuinness Stanford University, Stanford,
CA, 94305 [email protected] and [email protected]
http://en.wikipedia.org/wiki/Unstructured_data
http://semanticweb2001.aifb.uni-karlsruhe.de/
http://en.wikipedia.org/wiki/Blog
http://en.wikipedia.org/wiki/Ontology_(computer_science)
http://annotation.semanticweb.org/tools/
M.Vargas-Vera, E. Motta , J. Domingue M. Lanzoni , A. Stutt, F.
Ciravegna, MnM: Ontology-Driven Tool for Semantic Markup
TinyXml, http://www.grinninglizard.com/tinyxmldocs/index.html
• THANK YOU FOR YOUR ATTENTION
• QUESTIONS