Three valued Data.Maybe https://github.com/tolysz/possible

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BSD3 licensed by Marcin Tolysz
Maintained by tolysz@gmail.com

Maybe lacks the information if Nothing represents missing or empty value. The idea is to have http://en.wikipedia.org/wiki/Three-valued_logic for values. Depends on Aeson having missing value.

* Initial public version
Depends on 1 package:
Used by 1 package:
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