Dey A.K. (2000)
Context is any information that can be used to characterize the situation of entities (i.e. whether a person, place or object) that are considered relevant to the interaction between a user and an application, including the user and the application themselves. Context is typically the location, identity and state of people, groups and computational and physical objects.
The three levels of knowledge[3]
实例化
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A portion of three-layer ontology[4]
可用于情景元素和场景
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