QoS based Semi-Automatic Web Service Composition using Multi-Agents Systems

This paper presents an agent and ontology based approach that supports the semi-automatic composition of Web services. A Web service is an accessible application that other applications and humans can discover and invoke to satisfy multiple needs. To reduce the complexity featuring the composition of Web services, two concepts are put forward, namely, software agent and ontology. An agent is an entity that acts on behalf of others in an autonomous fashion, performs its actions in some level of pro-activity and reactivity and exhibits some levels of the key attributes of learning, cooperation, and mobility. Agent Based Systems (ABS)[11] may be divided, roughly, into individual agents, and multi-agent systems (MAS)[11]. Agent technology has been a hot topic, and most likely, this is mainly due to the popularity of the Java programming language, which represents an ideal language for implementing software agents as it is the “Write Once Run Anywhere” language. Ontology is a formal representation of knowledge as a set of concepts within a domain, and the relationships between those concepts. It is used to reason about the entities within that domain, and may be used to describe the domain. The Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies. This paper provides the way to select an optimal composition of services and it also propose a framework for Semi-Automatic Web Services Composition. KeywordsAgents, Web Service, Web Service Composition , OWL-S, WSIG

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