It has been discussed and stated that indeed the required=true is not put on the form.
This is not a bug since jbpm DOES validate if the required variable is not null but since
JSF puts an empty string in there, jBPM thinks it is ok. The 'fix' therefor is to
put the required=true on the form yourself at the moment. If you want you van extend the
form generator to put it in there automatically.
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