2006.04.04 16:50 "[Tiff] BigTIFF Suggestion", by Larry Michaels

2006.04.15 10:18 "Re: [Tiff] BigTIFF Suggestion", by Antoine

On 14/04/06, Joris <joris.at.lebbeke@skynet.be> wrote:

This is probably a stupid comment...

I thought you could create your own tags with tiff? I would be shocked to find that that wasn't the case with bigTiff (having strictly 0 knowledge of the aforementioned...)... so why not create your own tag and be done with it?

Because a tag's logical scope is the IFD, not the file.

Suppose that wouldn't be the case. Then each IFD unlink, or IFD append, or IFD copy operation or whatever, had to scan through every IFD in the file to find tags that it should change to reflect that operation. Even more importantly, knowledge of all tags would be required for these operations, and thus the whole scheme of private tags would be invalidated.

Like I said - it was probably a stupid comment!


This is where I should put some witty comment.