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Various categorizations of context have been proposed in the past. Dey and Abowd (1999)Towards a Better Understanding of Context and Context-Awareness distinguish between the context types location, identity, activity and time. Kaltz et al. (2005) identified the categories user&role, process&task, location, time and device to cover a broad variety of mobile and web scenarios. They emphasize yet for these classical modalities that any optimal categorization depends very much on the application domain and use case. Beyond more advanced modalities may apply when not only single entities are addressed, but also clusters of entities that work in a coherence of context, as e.g. teams at work or also single bearers with a multiplicity of appliances.

Various categorizations of context have been proposed in the past. Dey and Abowd (1999)Towards a Better Understanding of Context and Context-Awareness distinguish between the context types location, identity, activity and time. Kaltz et al. (2005) identified the categories user&role, process&task, location, time and device to cover a broad variety of mobile and web scenarios. They emphasize yet for these classical modalities that any optimal categorization depends very much on the application domain and use case. Beyond more advanced modalities may apply when not only single entities are addressed, but also clusters of entities that work in a coherence of context, as e.g. teams at work or also single bearers with a multiplicity of appliances.

目前，有很多情景分类的方法。 Dey and Abowd (1999)^[3]对情景中的位置、身份、活动和时间进行了区分；Kaltz et al.(2005)^[4]将移动设备和网络场景考虑在内，确定了用户与角色、流程与任务、位置、时间和设备的分类方法。他们还强调，对于这些经典模式，任何最佳分类都非常依赖于应用程序领域和实例。除了更先进的模式之外，如果不仅涉及单一实体，而是在一致背景下开展工作的多个实体，例如:团队协作或多任务处理。

目前，有很多情景分类的方法。 Dey and Abowd (1999) <ref name="ReferenceA">[ftp://ftp.cc.gatech.edu/pub/gvu/tr/1999/99-22.pdf Towards a Better Understanding of Context and Context-Awareness]</ref> 对情景中的位置、身份、活动和时间进行了区分；Kaltz et al.(2005) (2005)<ref name="kaltz2005">{{cite journal

}}</ref> 将移动设备和网络场景考虑在内，确定了用户与角色、流程与任务、位置、时间和设备的分类方法。他们还强调，对于这些经典模式，任何最佳分类都非常依赖于应用程序领域和实例。除了更先进的模式之外，如果不仅涉及单一实体，而是在一致背景下开展工作的多个实体，例如:团队协作或多任务处理。

Some classical understanding of context in business processes is derived from the definition of AAA applications<ref>[http://www.cisco.com/en/US/docs/ios/12_2/security/configuration/guide/scfaaa.html CISCO AAA Overview]</ref> with the following three categories:

Some classical understanding of context in business processes is derived from the definition of AAA applications<ref>[http://www.cisco.com/en/US/docs/ios/12_2/security/configuration/guide/scfaaa.html CISCO AAA Overview]</ref> with the following three categories: