used, then
it matches streams which both have this type and match the
<var>additional_stream_specifier</var>. Otherwise, it matches all streams of the
specified type.
</p></dd>
<dt>&lsquo;<samp>p:<var>program_id</var>[:<var>additional_stream_specifier</var>]</samp>&rsquo;</dt>
<dd><p>Matches streams which are in the program with the id <var>program_id</var>. If
<var>additional_stream_specifier</var> is used, then it matches streams which both
are part of the program and match the <var>additional_stream_spec