Thomas A. Schmitz wrote:
1. The syntax [name:Minion Pro\xetexcolon mapping=tex-text;+onum;] will only work for installed fonts, not for opentype fonts that are in the texmf-tree,
correct
My experiments suggest that these can be found via the [file:<filename>] mechanism, but I can't append any "mapping" or other specials.
almost certainly correct. While nearly everything (except the engine-options) is supported by XeTeX's low-level interface, I expect that context would interpret such a specification as if you were asking for the file "minionpro:mapping=tex-test.otf", and it would therefore generate the wrong low-level syntax.
2. This syntax will go away soon, so it's no use spending time on experiments.
definately correct. Best wishes, Taco