[XeTeX] WordSpace question

[Vadim Radionov]

Dear list members,

Can you explain me the rules for WordSpace (and the effect that, I suppose,
contradicts 5.4 of fontspec manual)?
Is it possible to set different word spacing for different sizes with
SizeFeatures? (I failed).

Vadim

% -*- tex-command: "xelatex" -*-
\documentclass{minimal}
\usepackage{polyglossia}
\setmainfont{Garamond Premier Pro}

\def\test{\qquad Space: \the\fontdimen2\font;
Stretch: \the\fontdimen3\font;
Shrink: \the\fontdimen4\font\par}

\def\TEST{\fontsize{10}{12pt}\selectfont
This is a test \test\par
\fontsize{12}{14pt}\selectfont
This is a test \test}

\begin{document}

{\TEST}
{\addfontfeature{WordSpace={1,1,1}} \TEST}
{\addfontfeature{WordSpace=1} \TEST}

\end{document}

[This is XeTeX, Version 3.1415926-2.2-0.9994.1 (Web2C 7.5.6)]
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://tug.org/pipermail/xetex/attachments/20091227/fbe5e969/attachment.html>