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Updated documentation to changes of axiom rule output format.

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Patrick Lühne 2016-08-15 16:48:17 +02:00
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doc/output-format.md
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@ -190,12 +190,14 @@ axiomRule(axiomRule(<number>)).
precondition(<axiom rule>, <variable>, <value>).
% defines that after applying <axiom rule>, <variable> is assigned <value>
postcondition(<axiom rule>, <variable>, <value>).
postcondition(<axiom rule>, effect(unconditional), <variable>, <value>).
```
Axiom rules are similar to [actions](#actions) in that they modify [variables](#variables) if certain preconditions are satisfied.
However, axiom rules must be applied *immediately* as soon as their preconditions are satisfied.
The second argument of `postcondition`, `effect(unconditional)`, is not used and exists only for consistency with [actions](#actions).
Axiom rule facts are only present with SAS input programs and not PDDL.
Axiom rules contain essential information in order to find plans correctly.