XPath wildcards and contains() function usage

Question

I have a problem using XPath and contains function. Imagine the XML example below:

   <doc>  
     <Test>
       <Name>1 Pre Histoy</Name>
       <Type>Known</Type>
       <Data>
          <Name>Dinasor</Name>
          <Name>Fish</Name>
      </Data>
      </Test>

      <Test>
        <Name>1 Post Histoy</Name>
        <Type>Known</Type>
        <Data>
          <Name>Human</Name>
          <Name>Dog</Name>
        </Data>
     </Test>

      <Test>
        <Name>1 Post Histoy</Name>
        <Type>UNKNOWN</Type>
        <Data>
          <Name>Human</Name>
          <Name>Dog</Name>
        </Data>
     </Test>  

  </doc>

So what I want to do is returning all <Name> texts within <Data> node, with following criteria:

1. doc//Test/Name should contain "Pre" text

2. doc//Test/Type should be "Known"

What I need is a query like this but so far I couldn't manage it

/doc//Test[Name contains(.,'Pre') and Type='Known']/data//Name

Any help and tips will be appreciated.

Answer 1

Try this:

/doc/Test[contains(Name, "Pre") and Type="Known"]/Data/Name

Here is a working example implemented in Javascript to take advantage of StackOverflow's Runnable Code Snippets

function fu(path){
  var output = "";
  var results =  document.evaluate(path, document, null, XPathResult.ANY_TYPE  , null);
  while(nextResult = results.iterateNext()){ output += nextResult.outerHTML + "\n"; }
  return output;
}

document.body.innerText = fu('//doc/Test[contains(Name, "Pre") and Type="Known"]/Data/Name');

<doc>  
 <Test>
   <Name>1 Pre Histoy</Name>
   <Type>Known</Type>
   <Data>
      <Name>Dinasor</Name>
      <Name>Fish</Name>
  </Data>
  </Test>

  <Test>
    <Name>1 Post Histoy</Name>
    <Type>Known</Type>
    <Data>
      <Name>Human</Name>
      <Name>Dog</Name>
    </Data>
 </Test>

  <Test>
    <Name>1 Post Histoy</Name>
    <Type>UNKNOWN</Type>
    <Data>
      <Name>Human</Name>
      <Name>Dog</Name>
    </Data>
 </Test>  

  </doc>