Abstract:

The paper presents a theoretical analyzes of the query complexity of ontology data model in the context of virtual organizations with an experimental model for a computer based e-commerce ontology. The paper represents an important part of a study about the utility and improvements of Semantic Web technologies for knowledge management in the context of virtual organizations. We will make a comparison between two types of querying modalities – the one for relational data base model which is used frequently specially in economical applications and the one for ontology data model for Semantic Web which is becoming increasingly popular among researchers and software developers. To make comparison we will express the queries as conjunctive queries as they can be very general and powerful enough to express a domain.