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<H2><A NAME="SECTION0001611000000000000000">
Saving and Restoring Multiple Objects in a FitsChan</A>
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<P>
When using the native FITS encoding, multiple Objects may be stored
and all I/O operations are sequential. This means that you can simply
write a sequence of Objects to a FitsChanFitsChan. After each write operation,
the CardCard attribute will be updated so that the next write appends the
next ObjectObject description to the previous one.
<P>
If you then rewind the FitsChan, you can read the Objects back in the
original order. Reading them back will, of course, remove their
descriptions from the FitsChan (§<A HREF="node165.html#ss:readingnativefits">16.10</A>) but the
behaviour of the Card attribute is such that successive reads will
simply return each Object in sequence.
<P>
The only thing that may require care, given that a FitsChan can always
be addressed randomly by setting its Card attribute, is to avoid
writing one Object on top of another. For obvious reasons, the Object
descriptions in a FitsChan must remain separate if they are to make
sense when read back.
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