Noeud: Directives, Noeud « Next »: Typed Feature Structures, Noeud « Previous »: Built-In Predicates, Noeud « Up »: Top
Directives are introduced by :-/1 and are used to extend the
compiler or the reader/printer.
Unary directives such as require/1 are prefix operators with high
precedence, allowing to write for instance:
:-require 'foo.pl','bar.pl'.