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With the number of services increasing in a rapid speed in the Internet, it becomes a research hotspot to discover target service according to the service requirement. When single service can not satisfy the service requirement, services can be composed to provide complex function. There are already a lot of service composition methods, so it is crucial to provide a method to verify the correctness...
Long running Web Services composition has weaker notion of atomicity, which makes the traditional ACID mechanism for transaction processing no longer fit for Web Services composition transaction. Therefore, this paper first formally defines Web services composition compensation based on paired Petri net. Then it proposes five composition compensation patterns on the basis of paired Petri net: sequence,...
The number of virtual communities on Web 2.0 sites has been growing rapidly in recent years. This study selects 25 Social Network Sites (SNS) established in Taiwan as the targets. Through two in-depth interviews and a Focus Group Interview (FGI), a userspsila state transition diagram is developed and their corresponding transitional causes are also identified. A questionnaire is designed to collect...
This paper discusses a new flexible system to monitor stocks information available from Web services or dynamic HTML documents. This system allows users to use any public information available on the Internet for defining notification criteria. This opens up a huge repository of dynamic information related to stock investments such as current stock prices, daily trading volumes, current offer prices...
Variability management is an efficient solution to support service's reuse, but most of the existing variability models pay attention to service's functions and care little about the service's behavior that how these functions are invoked. In this paper, we provide a variability model based on Petri net that both the variable functions and the invocation constraint of these functions are handled....
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