<xs:element name="BaseFare" minOccurs="0"> <xs:annotation> <xs:documentation xml:lang="en">Price of the inventory excluding taxes and fees.</xs:documentation> </xs:annotation> <xs:complexType> <xs:attributeGroup ref="CurrencyAmountGroup" /> <xs:attributeGroup ref="ExchangeRateGroup" /> </xs:complexType> </xs:element>