[xsl] 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?
Thanks,
Mark
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