This module allows you to declare hierarchies of exception classes for use in your code. It also provides a simple exception class that it uses as the default base class for all other exceptions. You may choose to use another base class for your exceptions. Regardless, the ability to declare all your exceptions at compile time is a fairly useful trick and helps push people towards more structured use of exceptions.
WWW: http://search.cpan.org/dist/Exception-Class/
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