为了在开放、动态的环境中建立上下文感知系统,首先需要定义一个适合于知识共享的上下文描述,即上下文建模.提出了一种基于本体的通用上下文模型,由顶层上下文本体和6种特定本体构成.结合2008年汶川地震救援应用本体,描述了应用本体与通用上下文模型之间的关系.最后结合Web服务技术,提出了上下文感知的Web服务发现方法,对上下文感知计算的应用作了初步探索.%In order to construct context-aware systems in open and dynamic environment, there needs to define a contextual information description which is suitable for knowledge sharing, namely context modeling. On the basis of former researches, this paper proposes an ontology-based General Context Model (GCM). The GCM is constructed by Top Context Ontology (TCO) and six specific ontologies. Combining with application ontology for rescue of 2008 Wenchuan earthquake,the relationship between GCM and application ontology is described. Combining with Web services technology, this paper proposes a method for context-aware services discovery and carries out a preliminary exploration for the application of context-aware computing.
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