Frankly, to avoid any confusion, I would advocate putting it in all
relevant headers, including the primary even when it is empty.

- Arnold

Mark Calabretta wrote:

On Thu 2004/03/11 12:20:12 CDT, Thomas McGlynn wrote
in a message to: Thierry Forveille
and copied to: ,

one use of the IDs. However, I'm
concerned that if a single FITS file is not atomic with respect
to the dataset identifier, then it would generally be difficult
for software to use the ID to tie things together. E.g., one
would need to scan the entire FITS file to find the included IDs.

Putting an index of IDs in the primary header, i.e. just a list of the
IDs that come later, would preclude the need to scan past the first
header when looking for a particular ID.

Mark Calabretta
ATNF


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