<?xml version="1.0" encoding="UTF-8"?>
<xs:schema attributeFormDefault="unqualified"
           elementFormDefault="qualified"
           xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:include schemaLocation ="netvisorgeneraltypes.xsd" />

  <xs:complexType name="purchaseinvoiceidentifier">
    <xs:choice>
      <xs:element type="netvisor_positiveinteger" name="netvisorkey" />
      <xs:element type="netvisor_string_min1_max50" name="invoicenumber" />
    </xs:choice>
  </xs:complexType>

</xs:schema>