Re: Selecting between heading tags in XHTML

I want to select all siblings between heading tags in an XHTML file, as
shown below.

<div>
     <h4>my heading</h4> <<<---- select from this sibling
     <ol>
       <li></li>
     </ol>
     <p></p>
     <p></p>
     <p></p>
     <ul>
       <li></li>
     </ul>      <<<<---- all the way down to this sibling
     <h1></h1>  <<<<---- Do not select this sibling or anything after it
     <p></p>
     etc.
</div>

Given the context of <h4> above, I figure that

following-sibling::*[some predicate here]

would do this but I haven't guessed what would exclude the <h1> (or
<h2>, etc.) and everything that follows it. What's a good way to do this?