XML的XPath验证规则

Question

我有以下XML -

<root>
  <CUSTOMER_ID>0010059863</CUSTOMER_ID>
  <PO_NUMBER>6873w/PO_NUMBER>
  <VENDOR_ORDER_NUMBER>0038447</VENDOR_ORDER_NUMBER>
</root>

我需要创建一个Xpath，它应该满足以下条件-

1. 客户ID长度应该从1到10。不应该是空字符串，它应该始终存在于XML.

中。

1. PO_NUMBER长度应从1到20。PO_NUMBER可以是空白的，甚至可以不存在于XML中。但是如果它是唯一的并且没有VENDOR_ORDER_NUMBER.

，它必须有一个值。

1. VENDOR_ORDER_NUMBER长度应该从1到10。VENDOR_ORDER_NUMBER可以是空白的，甚至可以不存在于XML中。但是，如果它是唯一的，并且没有PO_NUMBER.

，那么它必须有一个值。

1. 至少有一个PO_NUMBER或VENDOR_ORDER_NUMBER应该存在于XML中。它们都可以出现在XML中。

。

1. 我们必须检查字段长度是否满足。

1. 供应商号和PO_number可以作为空白标记存在于XML中.

我写了以下几封信

boolean(//CUSTOMER_ID) and boolean(//VENDOR_ORDER_NUMBER) and count(//PO_NUMBER)=0 and string-length(//VENDOR_ORDER_NUMBER)<=10 and //VENDOR_ORDER_NUMBER!="" and string-length(//CUSTOMER_ID)<=10 and //CUSTOMER_ID!="" or boolean(//CUSTOMER_ID) and boolean(//PO_NUMBER) and count(//VENDOR_ORDER_NUMBER)=0 and string-length(//PO_NUMBER)<=10 and //PO_NUMBER!="" and string-length(//CUSTOMER_ID)<=10 and //CUSTOMER_ID!="" or (boolean(//CUSTOMER_ID) and boolean(//VENDOR_ORDER_NUMBER) and boolean(//PO_NUMBER) and string-length(//VENDOR_ORDER_NUMBER)<=10 and //VENDOR_ORDER_NUMBER!="" and string-length(//CUSTOMER_ID)<=10 and //CUSTOMER_ID!="" and string-length(//PO_NUMBER)<=20) or (boolean(//CUSTOMER_ID) and boolean(//VENDOR_ORDER_NUMBER) and boolean(//PO_NUMBER) and string-length(//PO_NUMBER)<=20 and //PO_NUMBER!="" and string-length(//CUSTOMER_ID)<=10 and //CUSTOMER_ID!="" and string-length(//VENDOR_ORDER_NUMBER)<=10)

Answer 1

这似乎是Schematron的一项任务，例如给您一个开始：

<schema xmlns="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt3">
    <pattern>
        <rule context="root">
          <report test="CUSTOMER_ID">root element has CUSTOMER_ID child.</report>
          <report test="PO_NUMBER | VENDOR_ORDER_NUMBER">At least one of PO_NUMBER or VENDOR_ORDER_NUMBER should be present in the XML.</report>
        </rule>
        <rule context="root/CUSTOMER_ID">
          <report test="string-length() = (1 to 10)">Length of CUSTOMER_ID is between 1 and 10.</report>
        </rule>
    </pattern>
</schema>

我没有详细说明所有的规则，也不确定它们是否都是一致的(有些规则需要一定的字符串长度，还有一些则允许空值)。