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Context awareness is a property of mobile devices that is defined complementarily to location awareness. Whereas location may determine how certain processes in a device operate, context may be applied more flexibly with mobile users, especially with users of smart phones. Context awareness originated as a term from ubiquitous computing or as so-called pervasive computing which sought to deal with linking changes in the environment with computer systems, which are otherwise static. The term has also been applied to business theory in relation to contextual application design and business process management issues. == Qualities of context == 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. Some classical understanding of context in business processes is derived from the definition of AAA applications〔(CISCO AAA Overview )〕 with the following three categories: * Authentication, which means i.e. confirmation of stated identity * Authorisation, which means i.e. allowance to accrual or access to location, function, data * Accounting, which means i.e. the relation to order context and to accounts for applied labour, granted license, and delivered goods, these three terms including additionally location and time as stated. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Context awareness」の詳細全文を読む スポンサード リンク
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