Web Engineering Methodologies (WebML UWE Hera RMM) support the representation and modeling of web services in a lifecycle, based on service oriented architecture (SOA). Theses methodologies, however, vary in supporting semantic web components and semantic web services (SWS). In this work, we present a general comparison between different web engineering methodologies with special attention to semantic web components modeling and we track the weaknesses of common web engineering methodologies in modeling semantic web services. This work presents also an extension to WebML methodology where symbols, diagrams and notions are added to support the modeling of semantic web services according to DAML-S framework (DARPA agent markup language for services). Additionally, a software tool was built to support this extension and generate ontologies of semantic web services automatically based on new diagrams. This tool also supports matching with semantic ranking between semantic web services advertisements and client's requests.