-<!ELEMENT Exists (In, Where)>
-
-<!ELEMENT Use (%queryexpr;, Position)>
-
-<!ELEMENT Position EMPTY>
-<!ATTLIST Position
- binder CDATA #REQUIRED>
-
-<!ELEMENT UsedBy (%queryexpr;, Position)>
-
-<!ELEMENT ConstructorsOf %queryexpr;>
-
-<!ELEMENT Pattern (Prefix, TokenList, (FragmentID?))>