Abstract
Ontologies enhance searching information on the Web since they provide relationships and semantics among them. Ontology is required to describe the semantics of concepts and properties used in a web document. It is needed to describe products, services, processes and practices for any software components. Software components are essential part of software development process. Using component is essential in nowadays software development. This paper demonstrates several experiments to extract concepts to build ontologies that improve the description process for software components embedded in a web document. In this paper we built ontology (mainly concepts) for some software components then used them to solve some semantic problems. We collected many documents that describe components in .Net and Java from several and different resources. Concepts were extracted and used to decide which domain of any given description (semantic) is close or belong to.