Building Semantic Mashup

Mashups allowed a significant advance in the automation of interactions between applications and Web resources. In particular, the combination of Web APIs is seen as a strength, which can meet the complex needs by combining the functionality and data from multiple services within a single Mashup application. Automating the process of building Mashup based mainly on the Semantics Web APIs facilitate to the developer their selection and matching. In this paper, we propose SAWADL (Semantic Annotation for Web Application Description Language), an extension of the WADL language that allows the semantization of the REST Web Service. We introduce a reference architecture with five layers representing the main functional blocks for annotating and combining web APIs, and therefore make the engineering process of Mashup applications more agile and more flexible.