Recipe

<xs:complexType name="Recipe">
  <xs:sequence>
    <xs:element ref="r:name"/>
    <xs:element ref="r:source" minOccurs="0" maxOccurs="1"/>
    <xs:element ref="r:description" minOccurs="0" maxOccurs="1"/>
    <xs:element ref="r:ingredientList" minOccurs="1" maxOccurs="unbounded"/>
    <xs:element ref="r:preparation"/>
  </xs:sequence>
  <xs:attribute name="servings" type="r:Servings"/>
  <xs:attribute name="time" type="xs:duration"/>
  <xs:attribute name="calories" type="xs:positiveInteger"/>
</xs:complexType>