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project-m36/src/lib/ProjectM36/AttributeNames.hs
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1module ProjectM36.AttributeNames where
2import ProjectM36.Base
3import qualified Data.Set as S
4--AttributeNames is a data structure which can represent inverted projection attributes and attribute names derived from relational expressions
6empty :: AttributeNames
7empty = AttributeNames S.empty
9all :: AttributeNames
10all = InvertedAttributeNames S.empty