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Delphi

 SRuleSyntax = 
  '(defrule [<module-name>::]<symbol-name>'+sLineBreak+ 
  '         [<string-comment>]'+sLineBreak+ 
  '         [(declare [(auto-focus <boolean-expression>])|'+sLineBreak+ 
  '                   [(salience <integer-expression>)]|'+sLineBreak+ 
  '                   [(oneshot <boolean-expression>])|'+sLineBreak+ 
  '                   [(enabled <boolean-expression>])]'+sLineBreak+ 
  '    <conditional-element>*'+sLineBreak+ 
  '    =>'+sLineBreak+ 
  '    <action>*)'+sLineBreak+ 
  ''+sLineBreak+ 
  '<conditional-element>   = <pattern> | ?<variable-name> <- <pattern> |'+sLineBreak+ 
  '          (test <function-call>) |'+sLineBreak+ 
  '          (not <conditional-element>) |'+sLineBreak+ 
  '          (unique <conditional-element>) |'+sLineBreak+ 
  '          (explicit <conditional-element>) |'+sLineBreak+ 
  '          (exists <conditional-element>+)'+sLineBreak+ 
  '<pattern>               = (<template-name> <slot>*)'+sLineBreak+ 
  '<slot>                  = (<slot-name> <constraint>*)'+sLineBreak+ 
  '<constraint>            = ? | $? | <connected-constraint>'+sLineBreak+ 
  '<connected-constraint>  = <single-constraint> | <<single-constraint>&<connected-constraint>> |'+sLineBreak+ 
  '          <<single-constraint>|<connected-constraint>>'+sLineBreak+ 
  '<single-constraint>     = <constant> | <variable> | :<function-call> | =<function-call> |'+sLineBreak+ 
  '         ~<constant> | ~<variable> | ~:<function-call> | ~=<function-call>'+sLineBreak+ 
  '<action>                = <constant>|<variable>|<function-call>'+sLineBreak+ 
  '::                      = Module separator.  Module name is optional.  If not specified, a rule belongs to the currently active module'; 
 

Reference

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