The <multiplicity> element of the deployment descriptor is a sub-element of the <ejb-relationship-role> element. It can have values as one or many. If the value of the <multiplicity> element is set to one, the bean that is related to the given bean will have a cmr field with a single element. When the <multiplicity> element is set to many, the partner of the bean will have a cmr field set as a collection.
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