|
Volume 6, Number 1, January-March 2009
RESEARCH PAPERS
PAPER ONE:
“WSBen: A Web Services Discovery and Composition Benchmark Toolkit1”
Vom Brocke, Jan
In this article, a novel benchmark toolkit, WSBen, for testing web services discovery and composition algorithms is presented. The WSBen includes: (1) a collection of synthetically generated web services files in WSDL format with diverse data and model characteristics; (2) queries for testing discovery and composition algorithms; (3) auxiliary files to do statistical analysis on the WSDL test sets; (4) converted WSDL test sets that conventional AI planners can read; and (5) a graphical interface to control all these behaviors. Users can fine-tune the generated WSDL test files by varying underlying network models. To illustrate the application of the WSBen, in addition, we present case studies from three domains: (1) web service composition; (2) AI planning; and (3) the laws of networks in Physics community. It is our hope that WSBen will provide useful insights in evaluating the performance of web services discovery and composition algorithms. The WSBen toolkit is available at: http://pike.psu.edu/sw/wsben/.
To obtain a copy of the entire article, click on the link below.
http://www.igi-pub.com/articles/details.asp?ID=34326
PAPER TWO:
“USDL: A Service-Semantics Description Language for Automatic Service Discovery and Composition”
Kona, Srividya; Bansal, Ajay; Simon, Luke; Mallya, Ajay; Gupta, Gopal; Hite, Thomas D.
Web services and Service-Oriented Computing is being widely adopted. In order to effectively reuse existing services, we need an infrastructure that allows users and applications to discover, deploy, compose, and synthesize services automatically. This automation can take place only if a formal description of the Web services is available. In this article we present an infrastructure using USDL (Universal Service-Semantics Description Language), a language for formally describing the semantics of Web services. USDL is based on the Web Ontology Language (OWL) and employs WordNet as a common basis for understanding the meaning of services. USDL can be regarded as formal service documentation that will allow sophisticated conceptual modeling and searching of available Web services, automated service composition, and other forms of automated service integration. A theory of service substitution using USDL is presented. The rationale behind the design of USDL along with its formal specification in OWL is presented with examples. We also compare USDL with other approaches like OWL-S, WSDL-S, and WSML and show that USDL is complementary to these approaches.
To obtain a copy of the entire article, click on the link below.
http://www.igi-pub.com/articles/details.asp?ID=34327
PAPER THREE:
“Using Web Service Enhancements to Establish Trust Relationships with Privacy Protection (Extended and Invited from ICWS 2006 with id 47)”
Weaver, Alfred C.; Wu, Zhengping
The lack of effective trust establishment mechanisms impedes the deployment of diverse trust models for web services. One issue is that collaborating organizations need mechanisms to bridge extant relationships among cooperating parties. We describe an indirect trust establishment mechanism to bridge and build new trust relationships from extant trust relationships with privacy protection. Another issue is that a trust establishment mechanism for web services must ensure privacy and owner control. Current web service technologies encourage a service requester to reveal all its private attributes in a pre-packaged credential to the service provider to fulfill the requirements for direct trust establishment. This may lead to privacy leakage. We propose a mechanism whereby the service requester discovers the service provider’s requirements from a policy document, then formulates a trust primitive by selectively disclosing attributes in a pre-packaged credential to negotiate a trust relationship. Thus the service requester’s privacy is preserved.
To obtain a copy of the entire article, click on the link below.
http://www.igi-pub.com/articles/details.asp?ID=34328
PAPER FOUR:
“Web Services Discovery with Rough Sets”
Li, Maozhen; Yu, Bin; Sahota, Vijay; Qi, Man
Web services are emerging as a major technology for building service-oriented distributed systems. Potentially, various resources on the Internet can be virtualized as Web services for a wider use by their communities. Service discovery becomes an issue of vital importance for Web services applications. This article presents ROSSE, a Rough Sets based Search Engine for Web service discovery. One salient feature of ROSSE lies in its capability to deal with uncertainty of service properties when matching services. A use case is presented to demonstrate the use of ROSSE for discovery of car services. ROSSE is evaluated in terms of its accuracy and efficiency in service discovery.
To obtain a copy of the entire article, click on the link below.
http://www.igi-pub.com/articles/details.asp?ID=34329
PAPER FIVE:
“A Model-Based Approach for Diagnosing Fault in Web Service Processes”
Yan, Yuhong; Dague, Philippe; Pencole, Yannick; Cordier, Marie-Odile
Web service orchestration languages are de?ned to describe business processes composed of Web services. A business process can fail for many reasons, such as faulty Web services or mismatching messages. It is important to ?nd out which Web services are responsible for a failed business process because we could penalize these Web services and exclude them from the business process in the future. In this paper, we propose a model-based approach to diagnose the faults in a Web service-composed business process. We convert a Web service orchestration language, BPEL4WS, into synchronized automata, so that we have a formal description of the topology and variable dependency of the business process. After an exception is thrown, the diagnoser can calculate the business process execution trajectory based on the formal model and the observed evolution of the business process. The faulty Web services are deduced from the variable dependency on the execution trajectory.
To obtain a copy of the entire article, click on the link below.
http://www.igi-pub.com/articles/details.asp?ID=34330
*****************************************************
For full copies of the above articles, check for this issue of the International Journal of Web Services Research (JWSR) in your Institution's library.
*****************************************************
|
