Ontology Design for USC Semantic Information Research Lab

Chen Li, Tengfei Li, Tian Wang

Outline

•Introduction

•Resources

•Ontology Design

•Design Java interface

•Result

•Conclusion

•Future Work

Introduction

Introduction

Semantic Information Research Laboratory• People• Research• Publication• News• Sponsors

Problem•How to represent the data in a domain•Certain Information is cross-domain e.g. Papers have the author of some people.

By using an on-meta ontology to overcome the problem and find the correlation between instance.

Resource

• OWL: Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies

• Protégé: An open-source tool help construct domain models and knowledge-based applications with ontology

• FaCT++: The new generation of the well-known FaCT OWL-DL reasoner

• Some Java API: Jfact, owlapi

Ontology Design

Mainly four sub-domain is considered in this project.

• Research Interest: the specific area which people focus on• People: faculty, students and alumni.• Papers: paper info that people wrote.• Organization: organization that people work in or belong to

Create the relation between those three class and sub-class of them.e.g. People all have research interest.

Papers are all written by some people.

Proper correlation is set up to achieve the cross domain search.

Ontology Design-Overall

Ontology Design -Research Interest

Research Interest contains the specific area for the researching area.Task:

• Define the research: go thought all the topics and summarize• Question: Could a topic belong to more than one interest? Yes.

Ontology Design-Research Interest

Ontology Design- People

People is created as a class and it has three subclass: Faculty, Student, Alumni.

Faculty include the employees for the lab.Student mainly include current Ph.D. students in the lab.Alumni mainly include previous Ph.D. students in the lab.Three sub-class have links with each other along with other classes.

Ontology Design- People Faculty: how to define faculty.•Faculty != People• People and Member Of some Educational

Alumni: previous students who worked in some lab•People and Worked In Semantic Information Research Laboratory

Student: who currently worked in some lab•People and Work In Semantic Information Research Laboratory

Ontology Design- People-Faculty

Ontology Design- People-Alumni

SECTION TITLE | 2

Ontology Design- People-Student

Ontology Design- People & Interest

Research Interest & People

People may have specific research interest in some area.The instances of students or faculty is linked to the instance of Research Interest.

Ontology Design- Papers

Ontology Design Paper & Interest

Ontology Design: People & Paper & Interest

Ontology Design-Organization

Organization contains the national and affiliates organization in the domain: •Define the organization by using a top-down level along with two sides: national and educational.

Ontology Design-Organization

Two relations•National-Lab(Sponsor) e.g. NASA sponsor the lab.•University-School-Department-School(affiliate) e.g. A top-down level of university structure.

Ontology Design-Organization

Specific lab can be linked to the people in the lab by member of relation.

Ontology Design-Organization & People

Two relations exists between People and Organization: Work in connects current member to the organization and Worked In connects previous member to the organization.

Ontology Design-Inverse and transitive

Inverse Objects properties could bi-directionalPeople p has paper called A.Paper A’s author contains people p.That means: HasPaper inverse AuthorIs

Transitive Object properties could be transitiveResearch lab affiliate of cs department and cs department affiliate of USC, does lab affiliate of usc? Yes.

Design-Java Interface

ResultShow all the students:

ResultShow all the paper about data mining:

ResultShow all the students with research interest in Ontology:

ResultShow all people write the paper of data mining:

Conclusion

• Develop a meta-ontology for a knowledge domain that contains sub-domain which have it’s own individual ontology

• Create the structure for each sub-domain which stands for the inner relationship between instances.

• Create descriptive relationships across sub-domains for the cross-domain search.

• Use different search query to validate the effectiveness of our ontology.

Future work

1.How do we handle transitive object properties? Could we solve it in Ontology or in reasoner?

People work in Semantic research lab People work in USC

Future work

2.Improve the query methodNow use the raw DL query to query the data. What if the user does not know the DL query? Student who have written paper Related to semantic web ---WordNet

3. Detailed about the Education and paper

Thanks & QA