Advanced approach to web service composition

This is a pre-print of an article published in "Soft Computing in Computer and Information Science". The final authenticated version is available online at: https://doi.org/10.1007/978-3-319-15147-2_29.Web Service Composition (WSC) is a process that helps to save much programming and cost effort by reusing existing components—Web services. This process consists of two major stages—Web Service Discovery and Selection (WSD, WSS). This paper presents an overview of the current state-of-the-art WSD and WSS methods. It also provides an analysis and highlights major problems like lack of support of the syntactical description in fuzzy logic algorithms in WSD and complex approach shortage in WSS problem. Moreover, WSC approach and Service-level agreement (SLA) aware WSC System are presented