The required n attribute is the number of Id elements in this array.
Source
<xs:element name="MeasurementDeviceIds" type="ArrayReferenceType" minOccurs="0"><xs:annotation><xs:documentation>The optional MeasurementDeviceIds element is a list of the ids of one or more measurement devices in the measurement system to be studied.</xs:documentation></xs:annotation></xs:element>
The BiasStudyPlanType defines information that is related to abias statistical study where the bias (measured value versusactual value) of a measurement system is determined.
The required id attribute is the QIF id of the statistical study,used for referencing.
Source
<xs:complexType name="BiasStudyPlanType"><xs:annotation><xs:documentation>The BiasStudyPlanType defines information that is related to a bias statistical study where the bias (measured value versus actual value) of a measurement system is determined.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="MultipleProductInstanceStudyPlanBaseType"><xs:sequence><xs:element name="MeasurementDeviceIds" type="ArrayReferenceType" minOccurs="0"><xs:annotation><xs:documentation>The optional MeasurementDeviceIds element is a list of the ids of one or more measurement devices in the measurement system to be studied.</xs:documentation></xs:annotation></xs:element></xs:sequence></xs:extension></xs:complexContent></xs:complexType>