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Facts and rules are formalized in the usual Prolog-ish way,
with a few exceptions:
- usage of naming predicate name/1 is restricted to the first
body literal;
- facts cannot be named;
- predicates for dealing with preferences are subject to compilations and
must thus not be used in the input language;
- internal predicates must not be used in the input language.
For examples see Section .
Torsten Schaub
2000-12-05