Comment 1 for bug 1568555

font-variant is based on substitution rules in the GSUB table of the
font file, since those rules are automatically parsed and all related
glyphs included automatically, it should work already. If not, then you
need to atatch a file demonstrating the problem.

As for text-transform, sure support for it can be added, however, why on
earth would anyone want to use text-transform in an ebook -- why not
just include the correct text in the first place? Given that
text-transform is unlikely to be supported across all reader
implementations, using it is a pretty bad idea.

 status incomplete