Xquery查找属性是否不匹配

Question

我有两个相似结构的XML，结构如下：

<output>
<Erec Spec="1234">
  <Property Key="Id">12324</Property>
  <Property Key="Price">9000.000000</Property>
  <Property Key="Version">5</Property>
  <Property Key="Catalog">2</Property>
  <Property Key="ColorCode">991</Property>
  <Property Key="ColorDesc">Red</Property>
  <Property Key="ColorDesc">Blue</Property>
  <Property Key="CrossSells">false</Property>
  <Property Key="Currency">USD</Property>
</Erec> 
...
....
</output>

现在，我试图在两个文件之间使用Xquery比较，并进行1-1的比较，需要查找XML是否符合丢失的"键"，或者是否为此值进行值节点不匹配。

for $old in doc('reference.xml')/output/Erec
     for $new in doc('comparison.xml')/output/Erec
         return if (data($old/@Spec) = data($new/@Spec))
         (:Trying to find if both have same element 'Property' with same attribute value 'Key' but different node value:)
         (:How to find if any of the attribute 'Key' is present in  $propsOld but missing in $propsNew :)
                then for $propsOld in $old/Property 
                     for $propsNew in $new/Property
                     return if (data($propsOld/@Key) = data($propsNew/@Key))
                            then if ($propsOld/text() != $propsNew/text() )
                                 then concat("Attribute value mismatch - ",($old/@Spec)," -- ",$propsOld/@Key," -- ",$propsOld/text(),"|", $propsNew/text(),'
' ) 
                                 else()
                            else()
                else()

这是我能够提出的Xquery，它发现节点中的属性是相同的属性，但值不同。1）但是我找不到某些属性（键）是否丢失。2）某些EREC具有重复的键，例如" ColorCode"，它在我现有的输出中也错误地弹出，其匹配的colordesc与一个doc中的value Red匹配到另一个文档中的colordesc value blue。我该如何解决？

这也可以使用XSLT吗？

Answer 1

这看起来像是在工作。

    for $old in doc('reference.xml')/output/Erec
     for $new in doc('comparison.xml')/output/Erec
    return if (data($old/@Spec) = data($new/@Spec))
           then for $propsOld in $old/Property/@Key
                return if(count($new/Property[@Key=$propsOld]) = 0)
                       then  concat(" --- ",$propsOld, " Property doesn't exist ",$new/@Spec,'
' )
                       else(
                        if(count($new/Property[@Key=$propsOld]) = 1)
                        then  if($propsOld/../text() != $new/Property[@Key=$propsOld]/text())
                              then concat("Same Attribute, value mismatch - ",($old/@Spec)," -- ",$propsOld," -- ",$propsOld/../text(),"|", $new/Property[@Key=$propsOld]/text(),'
' )
                              else()
                        else()
                        )    
            else()