xPath：选择一系列兄弟节点，直到特定的兄弟节点(xPath: select a range of sibling nodes until a specific sibling node)

 我有以下Lis ： 
 
<ul>
    //1st subcategory with 4 sub categories        
    <li class="supercategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>

    //2nd subcategory with 3 sub categories 
    <li class="supercategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>

    //3d subcategory with 1 sub category
    <li class="supercategory"></li>
      <li class="subcategory"></li>
</ul>
 
 我一直试图获得所有超级类别之后的“2级”。 因此，对于第一个超类别，xpath匹配将是4个子类别sibling lis和第二个超类别，xpath将返回3 lis等等。 
 
 我尝试了几件事情，但简单的开始会是这样的： 
 
//li[@class="supercategory"][position()=2]/following-sibling::li[@class ="subcategory"]
 
 我试图在第二个超类别之后获得3子类别lis ，但显然这将返回所有具有类子类别的lis 。 
 
 因此，我想知道是否有一个更适合解决这个问题的谓词。 特别是在这种情况下，子类别是它们的超类别的兄弟节点。 
 
 为了方便起见，我一直在测试这里： https ： //www.freeformatter.com/xpath-tester.html 
 
 提前致谢。 

I have the following Lis:
 
<ul>
    //1st subcategory with 4 sub categories        
    <li class="supercategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>

    //2nd subcategory with 3 sub categories 
    <li class="supercategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>
      <li class="subcategory"></li>

    //3d subcategory with 1 sub category
    <li class="supercategory"></li>
      <li class="subcategory"></li>
</ul>
 
I have been trying to get all the "level-2"s that come after each super category. So for the 1st supercategory the xpath match would be the 4 subcategories sibling lis and the 2nd supercategory the xpath will return 3 lis and so on.
 
I have tried several things but a simplistic start would be something like:
 
//li[@class="supercategory"][position()=2]/following-sibling::li[@class ="subcategory"]
 
I am trying to get the 3 subcategory lis after the 2nd supercategory but obviously this will return all lis with classes subcategory.
 
Thus, I am wondering if there is a predicate that would be more suited to solve this problem. Especially that in this scenario the subcategories are sibling nodes with their supercategories.
 
For convenience I have been testing this here: https://www.freeformatter.com/xpath-tester.html
 
Thanks in advance.

原文：https://stackoverflow.com/questions/45676520