    class
    	MISMATCH_CORRECTOR

    General
    	cluster: base
    	description:
    		"Ancestor of all classes that need facility to retrieve an older version of an instance of current
    		class through storable.
    		Redefine `correct_mismatch' to get data from `mismatch_information' about found mismatch. A mismatch
    		might be the addition or the removal of an attribute as well as an attribute type change."

    Ancestors
    	ANY

    Queries
    	Mismatch_information: MISMATCH_INFORMATION

    Commands
    	correct_mismatch