Format is part of Publication. Format is a type of Change. Change is a synonym of Vary. Vary is a different concept from Consistent. 
Client is a synonym of Buyer. Buyer is related to Merchant. 
Publication <--PartOf-- Format --IsA--> Change <--Synonym--> Vary <--DistinctFrom--> Consistent 
Client <--Synonym--> Buyer <--RelatedTo--> Merchant 