xquery:查找父节点是否具有不同命名空间的子节点 [英] xquery: find if a parent node has a child node of a different namespace

问题描述

我正在尝试检查名称空间X"的节点是否具有不同名称空间Y"的子节点.我尝试了以下 xquery:

I am trying to check if a node of namespace 'X' has a child node of a different namespace 'Y'. I tried the following xquery:

declare namespace atom = "http://www.w3.org/2005/Atom";
declare namespace libx = "http://libx.org/xml/libx2";

let $doc := <node><entries xmlns="http://www.w3.org/2005/Atom" xmlns:libx="http://libx.org/xml/libx2"> 
             <libx:book-entry><book>Book 1</book><author>Author 1 PQR</author><title>Title 1</title></libx:book-entry> 
             <libx:car-entry><car>Car 1</car><model>Model 1</model><price>Price 1 PQR</price></libx:car-entry>
           </entries></node>, 
    $types := <types xmlns="http://libx.org/xml/libx2"><type>book-entry</type></types>, 
    $key := 'PQR'

for $type in $types/libx:type
return
   for $entry in $doc/atom:entries/*[name() eq $type]
     return $entry

我希望结果是:Book 1Author 1 PQR