A translator Web service for data mediation in Web service compositions

Abstract

Atomic Web services may not always provide solutions for business requests. In such cases, several services are integrated to create new composite services with added value. Establishing message exchange between related but independently developed Web services is a key challenge faced during Web service composition. This difficulty is often due to the difference in the schema of the messages of the Web services involved. Data mediation is required to resolve these challenges. To achieve this, we define a formal model for data mediation that considers the names and types of the message elements. Based on this model, we propose methods for resolving different kinds of message-level heterogeneities.