-type uri = string
-type position = string
-type depth = string
-type sort = string
-
-type spec = MustObj of uri list * position list * depth list
- | MustSort of sort list * position list * depth list
- | MustRel of position list * depth list
- | OnlyObj of uri list * position list * depth list
- | OnlySort of sort list * position list * depth list
- | OnlyRel of position list * depth list
- | Universe of position list
-
-val locate : string -> MathQL.query