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Abstract
The objective of this research work is to look into the
role of policies and context in framing the composition of Web
services. Context supports the development of adaptable Web
services and policies specify the behavior of Web services engaged
in composition. In this paper, we present this research work's
outcome, namely a context-based multi-type policy for Web services
composition in which the binding between Web services occurs at
four levels: component level to deal with Web services'
definitions and capabilities, composite level to address how Web
services are discovered and combined, semantic level to handle the
semantic heterogeneity that can arise between Web services, and
resource level to focus on the performance of Web services.
Because of the composition complex-nature, the proposed approach
uses three types of policies: engagement policies assess a Web
service participation in a given composition, mediation policies
deal with the semantic heterogeneity by tacking into account the
mappings and conversions between a set of component Web services,
and deployment policies manage the interactions between component
Web services and computing resources. Policies manage the
transitions between the four levels and context caters the
necessary information that tracks the composition progress.
Original language | English |
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Pages (from-to) | 327-351 |
Number of pages | 25 |
Journal | Data and Knowledge Engineering (DKE) |
Volume | 62 |
Issue number | 2 |
Publication status | Published - 2007 |
Keywords
- Context
- Exception
- Policy
- Web service.
- Composition
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