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-%%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%^^A This is a sample file to demonstrate the use of the \LaTeX style option
-%%^^A pl.sty.
-%%^^A
-%%^^A The ^^A is just used to make it printable with the documentation.
-%%^^A doc.sty insists on it. Otherwise a single % would have been enough.
-%%^^A
-%%^^A written by gene 11/94
-%%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-:- module(sample). /*
-
-This is a dummy module to show the possibilities of the \LaTeX{} style
-option pl.
-We define a predicate. It looks like
-
-\Predicate select/3(Member, List, Rest).
-
-This predicate describes the relation of the three arguments which fulfill
-$\mbox{\it Member}\in\mbox{\it List}$\/ and $\mbox{\it Rest}=\mbox{\it
-List}\backslash\mbox{\it Member}$.
-
-And here comes the implementation:
-\PL*/
-select(Member,[Member|Rest],Rest).
-select(Member,[Head|List],[Head|Rest]) :-
- select(Member,List,Rest).
-/*PL
-
-\Predicate in/2(Member, List).
-
-This predicate is a reimplementation of the predicate \verb|member/2|
-using the \verb|select/3| predicate.
-
-\PL*/
-in(Member,List) :-
- select(Member,List,_).
-/*PL
-Now we are done with the example.
-\EndProlog*/