Mustangproject生成XRechnung时含税价与净价一致的校验问题

我使用Mustangproject创建XRechnung时，校验器提示：当提供Gross price时，Item的net price必须等于（Gross price - Allowance amount），对应路径为/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction[1]/ram:IncludedSupplyChainTradeLineItem[1]/ram:SpecifiedLineTradeAgreement[1]/ram:GrossPriceProductTradePrice[1]

查看生成的XML，发现当前Item的GrossPriceProductTradePrice和NetPriceProductTradePrice的ChargeAmount均为100.0000：

<ram:SpecifiedLineTradeAgreement>
        <ram:GrossPriceProductTradePrice>
          <ram:ChargeAmount>100.0000</ram:ChargeAmount>
          <ram:BasisQuantity unitCode="EA">1.0000</ram:BasisQuantity>
        </ram:GrossPriceProductTradePrice>
        <ram:NetPriceProductTradePrice>
          <ram:ChargeAmount>100.0000</ram:ChargeAmount>
          <ram:BasisQuantity unitCode="EA">1.0000</ram:BasisQuantity>
        </ram:NetPriceProductTradePrice>
      </ram:SpecifiedLineTradeAgreement>

文档级别的Allowance及税费设置正确：

<ram:SpecifiedTradeSettlementHeaderMonetarySummation>
        <ram:LineTotalAmount>200.00</ram:LineTotalAmount>
        <ram:ChargeTotalAmount>0.00</ram:ChargeTotalAmount>
        <ram:AllowanceTotalAmount>10.00</ram:AllowanceTotalAmount>
        <ram:TaxBasisTotalAmount>190.00</ram:TaxBasisTotalAmount>
        <ram:TaxTotalAmount currencyID="EUR">36.10</ram:TaxTotalAmount>
        <ram:GrandTotalAmount>226.10</ram:GrandTotalAmount>              
        <ram:TotalPrepaidAmount>0.00</ram:TotalPrepaidAmount>
        <ram:DuePayableAmount>226.10</ram:DuePayableAmount>
      </ram:SpecifiedTradeSettlementHeaderMonetarySummation>

我当前添加Item的代码如下：

invoice.addItem(new Item(new BigDecimal(100.00), new BigDecimal(2), new Product("test", "name", "EA", new BigDecimal(19)))) .addAllowance(new Allowance(new BigDecimal(10)).setTaxPercent(new BigDecimal(19)));

请问是否有设置gross price的选项？或者是否需要以不同方式创建Item？

已通过升级到Mustang 2.11.0解决，该版本修复了当净价与含税价相同时自动移除含税价的问题（对应issue #369）。使用的校验器为：

• EPO Consulting XRechnung校验器
• 巴登-符腾堡州电子发票校验器

内容的提问来源于stack exchange，提问作者Jonas Stengel