fact: Definition UniqueAttribute {heading} (attr : BoundedString (HeadingNames heading)) := UniqueAttribute' (ibound (indexb attr)).
imports: Coq.Lists.List Coq.Strings.String Coq.Logic.FunctionalExtensionality Coq.Sets.Ensembles Fiat.Common.StringBound Fiat.QueryStructure.Specification.Representation.Notations Fiat.QueryStructure.Specification.Representation.Heading Fiat.QueryStructure.Specification.Representation.Tuple