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...ds and to the requirements in terms of context expressed by the developer. The pattern-based design of the component makes it possible to extend the strategies to accommodate emerging research, e.g., =-=[33]-=-, [34], [35] on matching and ranking that needs, however, to be adapted to consider the specifics of real-world services. 4.3 On-Demand Service Provisioning In case no running service instance has bee...

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...n-functional parameters in service descriptions. This results in different ways to name parameters, define parameters and describe internal processing which inhibits straightforward integration of WS =-=[3]-=-. The framework lacks the required foundations for implementing mechanisms such as service provisioning, service recommendation, and service composition. To achieve these highlevel mechanisms, service...

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...the word frequency of word j in service description i, n is the total number of service descriptions, and nj is the number of services that connj (1)tain word j. A variation of TF/IDF is proposed in =-=[14]-=- where a higher weight is given to the IDF value. The reason behind this approach is to normalise the bias of TF measure in short documents. The frequency of words in very short documents such as serv...

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...hing web service against existing ontology was proposed by [13]. A context-based semantic approach to the problem of matching and ranking web services for possible service composition is suggested in =-=[14]-=-. Unfortunately, all these approaches require clear and formal semantic mapping to existing ontologies. 2.2 Ontology Creation and Evolution Recent work has focused on ontology creation and evolution a...

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...ervice discovery approaches [20] use a reasoner to infer new knowledge from the concepts and relationships defined in semantic service descriptions and tend to be accurate. Non-logic-based approaches =-=[21,22]-=- aim to reduce the complexity of matchmaking by analysing service descriptions based on information retrieval techniques. Hybrid Matchmakers [23,24] combine the advantages of NonLogic-based techniques...

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...he two [5]. The limitations of logic-based semantic service matchmakers gave rise to a separate category of non-logic-based semantic matchmakers. Non-logic-based semantic service discovery approaches =-=[6]-=-, [7], [8], [9] aim to reduce the complexity of semantic matchmaking by analysing the frequency of occurrence of certain terms within service descriptions and determine semantics which are implicit in...

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...us on the semi-automatic creation of ontologies [15, 6, 12] such as generating ontologies from natural language text or automatic reuse of existing ontologies, e.g. based on the context of a document =-=[22]-=-. In fact, reusing public ontologies, e.g. TAP [7] or others, are less applicable in context of our work as design methodologies in an enterprise context rather describe proprietary concepts (e.g. dat...

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...Integration) are developed tosencourage adoption and interoperability of web services [3].sUDDI registries are require registration or made eithersavailable publicly and contain many obsolete entries =-=[4]-=-. Inseither case for available services a registry may store only aslimited description. As a technology concern web servicessare a self describing, self containing and modularsapplications, which are...

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... Web sites provided by the user [1]. They develop algorithms that detect and utilize HTML regularities in the Web documents to turn them into hierarchical semantic structures encoded as XML. Next, they present tree-mining algorithms that identify key domain concepts and their taxonomical relationships .Noy and Klein defined a set of ontologychange operations and their effects on instance data used during the ontology evolution process [2]. A context-based semantic approach to the problem of matching and ranking web services for possible service composition is suggested by A. Segev and E. Toch [8]. They present an analysis of different methods for classifying Web services for possible composition and present a context-based semantic matching method for ranking these possibilities. A.Patil, S. Oundhakar, A. Sheth, and K. Verma “METEOR-S Web Service Annotation Framework,”[3] presents a combined approach toward automatic semantic annotation of web services. They have developed algorithms to match and annotate WSDL files with relevant ontologies. They use domain ontologies to categorize Web services into domains. The approach relies on several matchers (e.g., string matcher, structural mat...