Exception Handelling in Work Flow

[Devi, Manjula]

Hello Everybody,
 
        I want to know how can we handel exception raised by the called
method of a WorkFlow Task inside a WorkFlow.
        Also while designing Business Object for WorkFlow we can have three
types of EXCEPTIONS Raised from the Method namely Application, System and
Temporary. What is the difference between them? Which one to be used when?
And How can we capture them in WorkFlow.
 
Regards
 
Manjula