Question

我有以下XML结构

<?xml version="1.0" encoding="UTF-8"?>
    <body>
       <division>
          <Atopic><longtitle>TitleDiv1 Atopic</longtitle></Atopic>
          <Btopic><longtitle>TitleDiv1 Btopic</longtitle></Btopic>
          <Ctopic><longtitle>TitleDiv1 Ctopic</longtitle></Ctopic>
          <division>
             <Atopic><longtitle>TitleDiv1.1 Atopic</longtitle></Atopic>
          </division>
         <Dtopic><longtitle>TitleDiv2 Dtopic</longtitle></Dtopic>
         <Etopic><longtitle>TitleDiv2 Etopic</longtitle></Etopic>
       </division>
    </body>

我使用`count（ancestor :: division [last（）] / * [contains（name（），'topic'）]）来获取body / division元素下的所有*主题。

我的需要是，如果我使用body/division/division/Atopic中的上下文，我想只获得正文/部门之前的主题。所以在这种情况下只有

<Atopic><longtitle>TitleDiv1 Atopic</longtitle></Atopic>
<Btopic><longtitle>TitleDiv1 Btopic</longtitle></Btopic>
<Ctopic><longtitle>TitleDiv1 Ctopic</longtitle></Ctopic>

而不是

 <Dtopic><longtitle>TitleDiv2 Dtopic</longtitle></Dtopic>
 <Etopic><longtitle>TitleDiv2 Etopic</longtitle></Etopic>

因为它位于上下文节点之后。

请建议。

Answer 1

您的上下文节点：//body/division/division/Atopic

您的纯XPath表达式：

//body/division/division/Atopic
 /ancestor::division[last()]
  /*[contains(name(), 'topic')]
     [
      count(.| //body/division/division/Atopic/ancestor::division[1]/preceding-sibling::*[contains(name(), 'topic')])
      =
      count(//body/division/division/Atopic/ancestor::division[1]/preceding-sibling::*[contains(name(), 'topic')])
     ]

此处有详细解释：xpath-select-all-elements-between-two-specific-elements

仅计数前置主题：Xpath

1 个答案: