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Context-aware Composition of Semantic Web Services

机译：语义Web服务的上下文感知组成

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摘要

Service-based systems are usually conceived and executed in highly dynamic environments, characterized by complex and continuously evolving users' requirements and surrounding conditions. To address this dynamicity, these systems should be designed keeping in mind the different execution contexts where they could be used. This typically impacts service discovery and composition with the aim of dynamically forging the system behavior better fitting a given context. This paper proposes a design approach based on a semantic model for context representation. It is an extension of the OWL-S ontology aimed at enriching the expressiveness of each section of a typical OWL-S semantic service description, by means of context conditions and adaptation rules. By having access to continuously updated context information, these descriptions can be exploited by a discovery/composition tool to automatically find the atomic or composite services that can be better-tuned to the requestor's behaviors and to the particular situations of the surrounding environment.
机译：基于服务的系统通常是在高度动态的环境中构思和执行的，其特征是复杂且不断变化的用户需求和周围环境。为了解决这种动态问题，应在设计这些系统时牢记可以使用它们的不同执行上下文。这通常会影响服务发现和组合，以动态地伪造更好地适应给定上下文的系统行为。本文提出了一种基于语义模型的上下文表示设计方法。它是OWL-S本体的扩展，旨在通过上下文条件和适应规则来丰富典型OWL-S语义服务描述的每个部分的表达。通过访问不断更新的上下文信息，发现/组合工具可以利用这些描述来自动查找可以更好地调整到请求者的行为以及周围环境的特定情况的原子或复合服务。

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