QuantityGroup 

Quantity related information such as per week, per person, for each 20
persons...

Element Group Information

Model

Quantity | Quantities
Children: Quantities, Quantity

Used By

Complex Types RuleQuantityType, RuleType, StockType
Element Quantities

Source 

<xs:group name="QuantityGroup">
  <xs:annotation>
    <xs:documentation>Quantity related information such as per week, per person, for each 20 persons...</xs:documentation>
  </xs:annotation>
  <xs:choice>
    <xs:element ref="Quantity"/>
    <xs:element ref="Quantities"/>
  </xs:choice>
</xs:group>