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  Kathleen Hall Jamieson and Karlyn Kohrs Campbell said that genre could be define depending of the diagnostic of a set of features.
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  different theories presented by different authors
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  caroylin R, Miller thinks that "genre" could be defined as the way of people react or respond to recurring social constructions.
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  caroylin R, Miller think that a good way to define genre is to see how users define "genre"
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  caroylin R, Miller said authorities can create a definition for genre, but users might be or not agree with those definitions.
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  swales think that genre depend of linguistic features , and those are connected to social context and function.
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  John Swales think a discousre community facilitate or enable interaction. those discourse are way co communicate people's goals.