An approach for semantic web service composition

In the paper the Semantic Web Services (SWS) composition is considered as a process of manipulating of complex service-oriented ontology-based workflows. The task for the composition is formulated as combining of existing semantic web services into package of services using service templates as composition patterns. Fulfillment of this objective is achieved by developing of workflow-based tool for graphical creation of SWS compositions using WSMO services and domain knowledge represented as WSML ontologies. The main aim of the proposed approach is to facilitate the reusing of software services. The Semantic Web Services Composer is a part of Semantic Web Unit (Atanasova et al, 2005) within the INFRAWEBS project. The SWS INFRAWEBS Composer is considered in the Design time and in the Run time. The Design-time Composer is intended to construct templates of semantic services combinations. On the base of these pre-defined plan templates and logical discovery the Run-time Composer will realize binding of concrete web services and will assist user in constructing its own composite service. Both Design-time and Run-time SWS Composers use the previous service compositions.