On Wed, Jun 19, 2013 at 01:49:26PM +0200, Jean-Claude Raoult wrote: > Le 19/06/2013 12:23, Khaled Hosny a écrit : > >On Sun, Jun 02, 2013 at 11:53:00AM +0200, Jean-Claude Raoult wrote: > >>The documentation is clear, for people using LaTeX or rather XeLaTeX. > >Presumably because you were reading LaTeX oriented documentation? XeTeX > >documentation itself documents the low level primitives and is macro > >package neutral, though it is a bit anæmic. > > > >>I tried to adapt the doc, and write > >>\font\truc="Linux Libertine O:mapping=tex-text:Ligatures=RareLigatures" > >>or instead of RareLigatures: Rare Ligatures or Historical. Nothing worked. > >OpenType features are accessed using 4-letter tag names, documenting > >those tags is beyond XeTeX documentation since they are part of the > >OpenType standard: > > > > http://www.microsoft.com/typography/otspec/featurelist.htm > > > >XeTeX just passes whatever tag you give to the OpenType layout engine. > > > >Regards, > >Khaled > > Thank you. This is just what I needed. Incidentally, the tag +liga > yielding ligatures for fi, ff, fl, ffi and ffl is the default. > It shoul be disabled for small caps: > \font\sc='Libertine Capitals O:-liga:mapping=tex-text" > is better. Otherwise, definition and even theorem look strange.
Since the engine knows nothing about such smallcaps fonts, it is left to the user to select/deselect features as appropriate. I’d consider this a font bug too, if it is a smallcap font then it shouldn’t have f-ligatures at all. Regards, Khaled -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex
