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Web service search has been a serious concern for service-oriented software development. The challenge is how to find the right Web services efficiently and effectively for a given development task. There have been many efforts on developing techniques or systems to search services. Though effective in certain scenarios, existing techniques do not form systems for public use; or are based on one query...
With the ever increasing number of functional similar web services being made available on the Internet, how to leverage, aggregate and make use of individual component's quality of service(QoS) information to derive the optimal QoS of the composite service which meets the needs of users is still an ongoing hot research problem. In this paper, the current QoS models and related calculation methods...
One of the thrilling uses of Web services lies in Web service composition, which integrates existing services into composite ones with higher usage. With increasing complexity of service composition, semantic information, which is well-regulated and easy to be retrieved, has been applied in Web service composition. And QoS has become a critical issue to evaluate the performance of Web applications...
Information exchange and convert is an important part of Internet of Things. The establishment of information sharing platform is necessary. In this article, DNS service principle and existing registration-mechanism are being imitated, in order to present a new data sharing platform-IIEDNS which based on the Internet of Things. Platform used the DNS service principle to achieve the link among platform...
To satisfy the requirement of making scientific decision quickly and correctly in distributed network environment, a Meta Web Service based Distributed Model Management and Composition Approach is proposed. The Overall framework of Meta web service is designed, and each component is analyzed. An improved model service matching algorithm is given. Utilizing backward reasoning technique to compose model...
With the rapid development of network technology and the increasing expansion of its size, there are more and more services need to be provided by network, so modern users have an increasing demand for making servers that operate and provide these services highly available. Obviously, stand-alone system is unappeasable, we must use the cluster as the server that operate those services especially the...
Web service composition is to integrate existing web services to provide a compound service which satisfies specified requirement. However, traditional web service compositions fail to provide different compound services under various scenarios. In this paper, we propose an approach to compose services with context. A context ontology is defined to describe the scenario for user. An abstract service...
In this paper, we propose the Service Data Link model (SDL), a service relationship modeling schema, to describe service data correlations, which are data mappings among the input and output attributes of services. SDL recognizes the close correspondence between service data correlations and webpage hyperlinks, and defines service data correlations with explicit declarations, making it more expressive...
Web forum was a fully developed, cheap and popular medium to support online communication. But most of the Web forums still followed the basic table view interface inherited from the antique Bulletin Board System (BBS). The rigid interface limited context perception by users. To avoid troubles of software developing, many Web service providers choose free package (such as the Discuz!) to deploy their...
The component service in Web service composition may fail or degrade in QoS thus needs to be replaced. In this paper, we propose a novel approach for services replacement of the composition. The target service could be replaced individually, or it could be replaced with its related services in the composition as a whole by a more complex service. In this way, far more choices will be available to...
Semantic information, which is well-regulated and easy to be retrieved, has greatly enriched the expressive ability of the Web. These advantages can be applied in Web Services to meet the increasing complexity of Web applications. In this paper, we propose a service composition approach. It combines the large-scaled Web Services and semantic information which is described in WSCpsila09. Besides, QoS...
Verification of services compatibility is an important issue in Web Services composition. With the growing of grain size, services will become more complicated with internal business processes and will have interactions with other services while composition.This paper proposed a Petri Net based approach to analyze the Web Services interactive behaviors compatibility. First, the interacting services...
Service dependency graph (SDG) is an AND/OR graph showing input output dependencies among service operations. As dependencies in an SDG are indirectly expressed by reasoning on data models used by service interface definitions, their re-usability and expressiveness are limited. In this paper, we propose an enhanced version of service dependency graph, namely SDG+. SDG+ enhances SDG with explicit dependency...
As SOC and Web service technology become more widely used, large amounts of services need to be efficiently and effectively composed to meet complex businesses. In this paper, we proposed an approach to resolve the composition problem over large-scale services. We used an inverted table as index for a quick service discovery, and applied a service dependency graph (SDG) and an AND/OR graph as the...
Web services are new paradigm of using the Web. One of emerging challenges is to discover Web services efficiently and precisely. Unfortunately, existing systems like UDDI often have the problems of low availability, low accuracy, and bad performance. In this paper, we propose an approach of semantic Web services discovery in P2P environment. Firstly, Web services are published and deployed in same...
This paper studies one of the standards about Web service conversations, the WSCL specification. We propose a method to verify conversations in WSCL. In this method we first propose using a translator to convert WSCL documents into promela, the modeling language of the model checker SPIN. Then, we run SPIN to check the conversation model against the correctness properties specified by the designer...
In this paper, we proposed a fast service composition method to solve the semantic composition problem defined by WS-Challenge. We construct an inverted table to index the services according to their output attributes. Based on the index, we developed the algorithms for service discovery and composition. Thanks to the high speed of service lookup through the index, our algorithm gains a high performance.
This paper is concerned with the efficiency of Web service discovery and composition. We proposed a quick Web service discovery and composition approach in SWSDS. In our approach, an index-based algorithm is adopted in both syntactic and semantic match during service discovery and composition. This paper is to introduce SWSDS and its discovery and composition algorithm
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