2006.10.16 20:34 "[Tiff] Tag 346", by Ross Presser
Some extensive googling has turned up that Tag 346 was proposed in 1995 to make it possible to create paletted images using colorspaces other than RGB (much in the way that PDF supports it). Cf the following:
Is there any extant software anywhere that implements this, either for writing or reading? (I have some hints that Pagemaker supported it at some point.)
Also, are there any sample images anywhere?