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| rule type | process-start | ||||||||
Syntax
  process-start condition?
     action*
A rule to be performed before all other processing.
A process-start has several special stream-related properties. Streams opened in process-start rules without specifying the domain-free open modifier can be written to by:
Changing groups in a process-start rule has the following effects:
Of course, changing groups never affects a subsequent rule if it is done within an action preceded by a using group as prefix.
Changing groups can affect a process-start rule as follows:
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Related Syntax domain-free, declare #main-output has domain-free process process-end using group  | 
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