- AtkRangeA given range or subrange, to be used with AtkValue
- AtkRelation — An object used to describe a relation between a object and one or more other objects.
- AtkRelationSet — A set of AtkRelations, normally the set of AtkRelations which an AtkObject has.
- AtkState — An AtkState describes a single state of an object.
- AtkStateSet — An AtkStateSet contains the states of an object.
