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Semantic Web services are playing an important role in the Web 2.0 and the Semantic Web. Semantic Web services provide several advantages for Web service discovery, composition and invocation. Research in the area of annotation mechanisms led to the formation of specifications like SAWSDL, WSDL-S and SA-REST. My work focuses on tool to support the annotation of Web services (both SOAP and REST services) in both a manual and semi-automated ways. The tool greatly aids users in annotation of Web services. I achieved the matching of the Web service description elements to ontological concepts with the help of different string similarity algorithms. My matching considers the definitions of the concept in the ontology and the documentation of the elements in the description documents for getting the recommendations. An evaluated accuracy of the recommendations provided by the tool while annotating Web services from the European Bioinformatics Institute indicates the utility of recommendations.