TaxGroup 

For airport, security, harbour ... taxes. Use the VAT tag for VAT
instead

Element Group Information

Model

Tax | Taxes
Children: Tax, Taxes

Used By

Element Taxes
Element Group PriceRangeGroup

Source 

<xs:group name="TaxGroup">
  <xs:annotation>
    <xs:documentation>For airport, security, harbour ... taxes. Use the VAT tag for VAT instead</xs:documentation>
  </xs:annotation>
  <xs:choice>
    <xs:annotation>
      <xs:documentation>One or many</xs:documentation>
    </xs:annotation>
    <xs:element ref="Tax"/>
    <xs:element ref="Taxes"/>
  </xs:choice>
</xs:group>