his anyway, so it
is redundant to require that this information must be written.  In the case
where there is no simple default value, the reader must be able to deal with the
missing tag, otherwise it places the burden on the writer to magically pull a
reasonable value out of thin air.  Of course, you may say that the writer could
get this information from the user, but conditions like this add an unnecessary
level complexity to the user interface.
</blockquote>

<a name='JPEG'></a>
<h3>The JPEG Segment Siz