Improving Semantic Web Service Discovery

2009

Development of dynamic open service environment for Web based systems integration become a time challenge. To improve the automation of Web services interoperation, a lot of technologies are recommended, such as semantic Web services and agents. In this paper an approach for semantic Web service discovery and propagation based on semantic Web services and FIPA multi agents is proposed. A broker allowing to expose semantic interoperability between semantic Web service provider and agent by translating WSDL to DF description for semantic Web services and vice versa is proposed. We describe how the proposed architecture analyzes the request and after being analyzed, matches or publishes the request. The ontology management in the broker creates the user ontology and merges it with general ontology (i.e. WordNet, Yago, Wikipedia ...). We also describe the recommender which analyzes the created WSDL based on the functional and non-functional requirements and then recommends it to Web service provider to increase their retrieval probability in the related queries.

2006

Abstract. Semantic Web Services enable discovery, execution and composition of automated web services by combining web services based on standards, such as SOAP, WSDL and UDDI, with semantic web technologies such as RDF, DAML+ OIL and OWL. In this paper, Matchmaking Services Model is suggested for the intelligent Web Services. The suggested model enables efficient matches between service requestors and service providers with the matchmaking algorithm.

Artificial Intelligence …, 2004

With the evolution of Web service technology, services will not only become increasingly sophisticated, but also move into the area of business-to-consumer and peer-to-peer interactions. Because of todays wide variety of services offered to perform a specific task, there is a need for mediation infrastructures able to support humans or agents in the eventual selection of appropriate services. It is a common opinion that such issues should be solved adopting semantically rich unambiguous descriptions. Hence, ontologies should be used to describe services, to ease their discovery and selection. In order to perform such a selection, a matchmaking procedure, based on semantic descriptions similarity, is needed. Technologies developed for the Semantic Web based on theoretical studies on Artificial Intelligence, particularly on Description Logics, can help in this sense. As the Semantic Web is conceived as an extension of the current one, technologies developed explicitly for they both must be used synergically in order to provide a semantic layer to approaches such as UDDI registries, using OWL formatted descriptions. In this paper we present a framework for discovery of services, stored in an UDDI registry, which exposes a description whose semantic can be modeled using OWL-DL based formalism. In order to perform this task, methodologies to compute semantic differences between two descriptions and non-standard inference services have been investigated and exploited in an implemented system.

Web Engineering, 2005

Abstract. The rapid development of semantic web services has led to a demand for a discovery mechanism. To perform discovery, researchers have developed Matchmakers to match web service requesters and providers. Current Match4 makers do not support the matching of ...

International Journal of Web and Grid Services, 2009

In this paper, we present an approach to semantic-based web service discovery and a prototypical tool based on syntactic and structural schema matching. It is based on matching an input ontology, describing a service request, to web services descriptions at the 'syntactic level' through Web Services Description Language (WSDL) or, at the semantic level, through service ontologies described with languages such as Ontology Web Language for Services (OWL-S), Web Services Modelling Ontology (WSMO), Semantic Web Services Framework (SWSF) and Web Services Description Language Semantics (WSDL-S). The different input schemas, WSDL descriptions, Ontology Web Language (OWL) ontologies, OWLS , WSMO, SWSF and WSDL-S components are represented in a uniform way by means of directed rooted graphs, where nodes represent schema elements, connected by directed links of different types, e.g., for containment and referential relationships. On this uniform internal representation, a number of matching algorithms operate, including structural-based algorithms (Children Matcher, Leaves Matcher, Graph and SubGraph Isomorphism) and syntactical ones (Edit Distance (Levenshtein Distance or LD) and Synonym Matcher (through the WordNet synonyms thesaurus)).

Proceedings of the 8th International Conference on Telecommunications, 2005. ConTEL 2005., 2005

The article deals with implementation issues of semantic matchmaking of Web services using intelligent middle agents in an electronic market (e-market). The idea of comparison of Web services according to their semantic descriptions is used to find the most appropriate service that meets user preferences. Comprehensive description of not only the syntax, but also semantic meaning of the service is used to find the most suitable match. Matchmaking procedure is based on DAML-S (DARPA Agent Markup Language for Services) ontology, which contains required semantic information for discovery and comparison as well as execution and monitoring of Web services. In order to find a service that satisfies user requirements, the intelligent software agent semantically compares descriptions of requested and advertised Web services using matchmaking algorithm and automated reasoner based on description logics. This way user will be provided with the most appropriate service that matches his requirements.

Proceedings of the 7th …, 2005

This paper describes a framework for ontology-based flexible discovery of Semantic Web services. The proposed approach relies on user-supplied, context-specific mappings from an user ontology to relevant domain ontologies used to specify Web services. We show how a user's query for a Web service that meets certain selection criteria can be transformed into queries that can be processed by a matchmaking engine that is aware of the relevant domain ontologies and Web services. We also describe how user-specified preferences for Web services in terms of non-functional requirements (e.g., QoS) can be incorporated into the Web service discovery mechanism to generate a partially ordered list of services that meet userspecified functional requirements.

Journal of Web Semantics, 2003

In this paper, we introduce a vision for Semantic Web services which combines the growing Web services architecture and the Semantic Web and we will propose DAML-S as a prototypical example of an ontology for describing Semantic Web services. Furthermore, we show that DAML-S is not just an abstract description, but it can be efficiently implemented to support capability matching and to manage interaction between Web services. Specifically, we will describe the implementation of the DAML-S/UDDI Matchmaker that expands on UDDI by providing semantic capability matching, and we will present the DAML-S Virtual Machine that uses the DAML-S Process Model to manage the interaction with Web service. We will also show that the use of DAML-S does not produce a performance penalty during the normal operation of Web services.