| Name | Description | Type | Package | Framework |
| AbstractNullPolicy | PUBLIC: Description: This node null policy allows for the handling of various representations of null in XML documents. | Class | org.eclipse.persistence.oxm.mappings.nullpolicy | EclipseLink |
| IsSetNullPolicy | This null policy allows for various configurations of isSet behavior to be set. | Class | org.eclipse.persistence.oxm.mappings.nullpolicy | EclipseLink |
| NullPolicy | This null policy is the default implementation class. | Class | org.eclipse.persistence.oxm.mappings.nullpolicy | EclipseLink |
| XMLNullRepresentationType | enum XMLNullRepresentationType An enum that is used within a Node Null Policy to determine what to marshal for a null node. | Class | org.eclipse.persistence.oxm.mappings.nullpolicy | EclipseLink |