用于插入父节点和子节点的XQuery

Question

我试图用一些文本以及其中的一个子节点替换一个节点。以下是我的XQuery。我没有得到理想的结果。

for $x in collection('articles')//Doc[Title/@No='Article 20'] 
    return replace value of node $x/Desc with "Article on Molecular Physics 
    <Date @d='20130805'/> in continuation with Part 1." 

Expecting-

.... 
<Desc>Article on Molecular Physics 
    <Date @d='20130805'/> in continuation with Part 1.</Desc> 
.... 

但我getting-

.... 
<Desc>Article on Molecular Physics 
    &lt;Date @d='20130805'/&gt; in continuation with Part 1.</Desc> 
.... 

Answer 1

为了得到想要的结果，我先删除节点，然后插入它如下 -

let $c := <Desc>Article on Molecular Physics <Date d='20130805'/> in continuation with Part 1.</Desc> 
for $x in collection('articles')//Doc[Title/@No='Article 20'] 
    return 
    (
     delete node $x/Desc, 
     insert node $c after $x/Title 
    ) 

这工作对我:)

Answer 2

因为你包括在字符串中新的XML元素，它被当做一个;即逃脱。尝试用你的元素想要的节点序列替换的字符串，像这样：

for $x in collection('articles')//Doc[Title/@No='Article 20'] 
    return replace value of node $x/Desc with 
    ("Article on Molecular Physics ", <Date d='20130805'/>, " in continuation with Part 1.")