cal bitstream
is a single, unmultiplexed logical bitstream with no meta-header; this
is referred to as a 'degenerate stream'.</p>

<p><a href="framing.html">Ogg Logical Bitstream Framing</a> discusses
the page format of an Ogg bitstream, the packet coding process
and logical bitstreams in detail. The remainder of this document
specifies requirements for constructing finished, physical Ogg
bitstreams.</p>

<h2>Mapping Restrictions</h2>

<p>Logical bitstreams may not be mapped/multiplexed into physical
bitstr