Use index on after filter on xpath

Question

I have this following xml fragment.

<root>
  <site type="main">
    <link>http://stackexchange.com</link>
  </site>
  <site type="qa">
    <link>http://stackoverflow.com</link>
  </site>
  <site type="qa">
    <link>http://superuser.com</link>
  </site>
  <site type="">
    <link>http://data.stackexchange.com</link>
  </site>
</root>

I want to select the first site's link of type "qa". I think //site[@type="qa"][1] should do it. But id does not work.

Answer 1

Give a try to (//site[@type="qa"])[1]/link/text().

Or, alternatively:

//site[@type="qa"][position()=1]/link/text()

Tested on http://www.xpathtester.com/, results into http://stackoverflow.com.