如何排除父元素和子元素节点

Question

如何排除 "Approach"" 和 "Amount1" 元素。我可以排除 "Amount1" 但无法同时消除两个节点 (Approach,Amount1)。

Sample.xml:

<root>
  <Approach> Approach </Approach>
  <Progress> Progress </Progress>
  <Objective> Objective </Objective>
  <fundingSources>
     <Source>
         <Amounts>
             <Amount1>thousands</Amount1>      
             <Amount2>millions</Amount2> 
        </Amounts>
    </Source>
  </fundingSources>
</root>

我可以通过这样做删除 Amount1 节点 fn:doc("sample.xml")//*[not((descendant-or-self::Amount1))]

结果return:

<root>
  <Approach> Approach </Approach>
  <Progress> Progress </Progress>
  <Objective> Objective </Objective>
  <fundingSources>
     <Source>
         <Amounts>
             <Amount2>millions</Amount2> 
        </Amounts>
    </Source>
  </fundingSources>
</root>

但努力结合另一个父节点名"Approach"省略。谢谢

Answer 1

您需要一种递归方法。 XSLT 可以很好地解决这个问题，但您也可以像这样使用 XQuery 来做到这一点：

xquery version "1.0-ml";

declare function local:filter(
  $nodes as node()*
)
  as node()*
{
  for $node in $nodes
  return typeswitch ($node)
    case element(Approach) return ()
    case element(Amount1) return ()
    case element()
    return element { node-name($node) } {
      $node/@*,
      local:filter($node/node())
    }
    case document-node()
    return document {
      local:filter($node/node())
    }
    default return $node
};

let $xml := <root>
  <Approach> Approach </Approach>
  <Progress> Progress </Progress>
  <Objective> Objective </Objective>
  <fundingSources>
     <Source>
         <Amounts>
             <Amount1>thousands</Amount1>      
             <Amount2>millions</Amount2> 
        </Amounts>
    </Source>
  </fundingSources>
</root>
return
  local:filter($xml)

HTH！

如何排除父元素和子元素节点

how exclude parent element and sub element nodes

xml

marklogic