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Data-Providing (DP) services allow query-like access to organizations' data via web services. The invocation of a DP service results in the execution of a query over data sources. In most cases, users' queries require the composition of several services. In this paper, we propose a novel approach for querying and automatically composing DP services. The proposed approach largely draws from the experiences...
In today's collaborative environments such as bioinformatics and healthcare, the access to an increasing number of data sources has been made in the form of Data-Providing Web Services. Current approaches to composing Web services are not suitable for this special class of Web services as they do not take into consideration the semantic relationship that holds between input and output sets of a Web...
While recent works in P2P data management systems (PDMSs) have focused only on integrating traditional data sources, the access to an increasing number of data sources has been made in the form of data-providing Web services in P2P-based e-collaboration environments. In this paper, we supplement current PDMSs with capability to handle data sources exposed as services. In our solution we model data-providing...
Interoperability is a crucial issue in the health care domain. It must be conducted along two tightly-coupled levels: "data" and "application" levels. The former is about bridging together heterogeneous medical data sources. The later is concerned with enabling medical applications to understand each other when they interact through Web services composition. In this paper we present...
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