Need explanation

[pu...@rediffmail.com]

I am concentrating entity engine configuration, entity model.Need some more explanation on the following : Multiple relationships can exist for each entity. Each relation is either of type \'one\', \'one-nofk\', or \'many\' depending on the cardinality of the relation and whether a foreign key is desired or not. If the type is \'one\' or \'one-nofk\' then the key-map elements must fully specify the primary key of the related entity. If the type is \'many\', the key-map elements are not restricted by the primary key of the related entity.ThanksPurani