2018.11.10 15:00 "Re: [Tiff] Libtiff will be released soon", by Bob Friesenhahn

We could potentially do the same. Assuming the tags are allocated in a linear order, if we jumped all the way to e.g. 50000 we would avoid clashes with Adobe tag registration for some time to come. Or if Adobe could grant us a chunk of e.g. 1000 tags, we could manage their usage and standardisation ourselves.

I just submitted a changeset such that COMPRESSION_ZSTD is changed to 50000 and COMPRESSION_WEBP is changed to 50001.

Bob
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Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/