This feature allows the properties or characteristics of a rule to be defined. The characteristics are declared on the LHS of a rule using the declare keyword. A rule may only have one declare statement and it must appear before the first conditional element on the LHS (as shown in section 5.1).
Syntax
<declaration> ::= (declare <rule-property>+)
<rule-property> ::= (salience <integer-expression>) |
(auto-focus <boolean-symbol>)
<boolean-symbol> ::= TRUE | FALSE