eams without restriction. Here we discuss design restrictions
on Ogg physical bitstreams in general, mostly to introduce
design rationale. Each 'media' format defines its own (generally more
restrictive) mapping. An 'Ogg Vorbis Audio Bitstream', for example, has a
specific physical bitstream structure.
An 'Ogg A/V' bitstream (not currently specified) will also mandate a
specific, restricted physical bitstream format.</p>

<h3>additional end-to-end structure</h3>

<p>The <a href="framing.html">framing specif