MANAGING ONTOLOGY SERVER REPOSITORY USING PERDURANT ONTOLOGY

Abstract

The semantic web is an extension of the current web, in that it represents information more meaningfully for humans and computers. It enables the description of contents and services in a machine-readable form. Ontology forms the backbone of this technology. It was defined as specification of a conceptualization. Ontologies are divided into two types, endurant and perdurant. Endurants are called objects or things; while the perdurants are actions and events that occur in specific time such as getting a visa, booking and registering. The ontology server is a kind of information system intended to manage ontologies. Unfortunately, until now there is no standard technique to develop the server. Endurant ontologies are represented by the standard UML class model and OWL, whereas perdurant instances couldn’t represented with the current ontology RDF graph. The main goal of this thesis is to find a suitable representation for perdurant ontology.To realize this, we focus on stories, which consist of a set of actions. For this reason, the study investigates the problem ofperdurant in traveling domain, which it has a wealthy stories of traveling. Then we extracted perdurant entities from the stories in that domain. Stories include endurants and perdurants entities. Consequently, the study establishes the solution by developing an endurant ontology at first and then suggested the Conceptual Dependency theory to represent one action in the story. To include all actions, we used the script and story notions. Moreover, the study proposed a general framework for the ontology server that consists of the data module that manages the repository at design time. This module contains the perdurant conceptual model (OWL-P). In addition to that, this framework suggests the structure of the perdurant Query, that will retrieve the perdurant data at run time. To demonstrate the usefulness of this proposed approach, we examined it by a case study with real perdurant queries .This research is a contribution to the ontology server research area, by proposing aconceptual model for perdurant ontology that corresponds to the current repository architecture in a form of Triple Store ontology graph.