<xs:simpleType name="NaturaType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="N1">
        <xs:annotation>
          <xs:documentation>Escluse ex. art. 15</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="N2">
        <xs:annotation>
          <xs:documentation>Non soggette</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="N3">
        <xs:annotation>
          <xs:documentation>Non Imponibili</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="N4">
        <xs:annotation>
          <xs:documentation>Esenti</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="N5">
        <xs:annotation>
          <xs:documentation>Regime del margine</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="N6">
        <xs:annotation>
          <xs:documentation>Inversione contabile (reverse charge)</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="N7">
        <xs:annotation>
          <xs:documentation>IVA assolta in altro stato UE (vendite a distanza ex art. 40 commi 3 e 4 e art. 41 comma 1 lett. b, DL 331/93; prestazione di servizi di telecomunicazioni, tele-radiodiffusione ed elettronici ex art. 7-sexies lett. f, g, DPR 633/72 e art. 74-sexies, DPR 633/72)</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>

public enum NaturaType
    {

        /// <remarks/>
        N1,

        /// <remarks/>
        N2,
       

        /// <remarks/>
        N3,

        /// <remarks/>
        N4,

        /// <remarks/>
        N5,

        /// <remarks/>
        N6,

        /// <remarks/>
        N7,
    }