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|explain.pl -- Describe Prolog Terms|
The library(explain) describes prolog-terms. The most useful functionality is its cross-referencing function.
?- explain(subset(_,_)). "subset(_, _)" is a compound term from 2-th clause of lists:subset/2 Referenced from 46-th clause of prolog_xref:imported/3 Referenced from 68-th clause of prolog_xref:imported/3 lists:subset/2 is a predicate defined in /staff/jan/lib/pl-5.6.17/library/lists.pl:307 Referenced from 2-th clause of lists:subset/2 Possibly referenced from 2-th clause of lists:subset/2
Note that PceEmacs can jump to definitions and gxref/0 can be used for an overview of dependencies.
Name/Arityor a term of the form
Module:Name/Arity, explain/1 describes the predicate as well as possible references to it. See also gxref/0.