| CredibilityRevision<T extends Formula> | 
 Abstract base class for a revision process on belief bases of type TBeliefBase, it
 provides a method to revise one belief base with another and a method 
 to revise a ordered list of belief bases. 
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| CredibilityRevisionIterative<T extends Formula> | 
 Implements the list based method of the Revision interface by iterative calling
 the revision method which revise two belief bases. 
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| CredibilityRevisionNonIterative<T extends Formula> | 
 Implements the revision method with two belief bases by delegating the processing
 to the revision method bases on an ordered list of belief bases. 
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| DefaultBaseExpansionOperator<T extends Formula> | 
 This class implements the default base expansion operator, ie. 
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| DefaultMultipleBaseExpansionOperator<T extends Formula> | 
 This class implements the default multiple base expansion operator, ie. 
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| LeviBaseRevisionOperator<T extends ClassicalFormula> | 
 This class implements the Levi identity for revision, ie. 
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| LeviMultipleBaseRevisionOperator<T extends ClassicalFormula> | 
 This class implements the Levi identity for multiple revision, ie. 
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| MultipleBaseContractionOperator<T extends Formula> | 
 This is the interface for a classic multiple belief base contraction operator, ie. 
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| MultipleBaseExpansionOperator<T extends Formula> | 
 This is the interface for a classic multiple belief base expansion operator, ie. 
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| MultipleBaseRevisionOperator<T extends Formula> | 
 This is the interface for a classic multiple belief base revision operator, ie. 
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