[XeTeX] Syriac in Polyglossia

[Gareth Hughes]

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I've been testing Polyglossia, and, as I primarily work in Syriac, have
been testing the package's function with the language.

I can't seem to get Polyglossia to do very much with Syriac but mark
text as RTL, so that I don't have to call a bidi environment as well. I
can't manage to get numerals=eastern or abjadsyriac to work. Also, there
doesn't seem to be documentation on how to use Polyglossia with
Fontspec: that is, how to name font declarations so that Polyglossia can
read them.

Could someone give me a few pointers here? Details of the issue are below.

Thanks,

Gareth.

I'm using XeTeX 3.141592-0.996 on Ubuntu. A minimal example is:

\documentclass[12pt,a4paper]{minimal}

\usepackage{fontspec,xltxtra,xunicode}
	\setmainfont{Linux Libertine}
	\newfontfamily\syriacfont[Script=Syriac]{Estrangelo Edessa}

\usepackage{polyglossia}
	\setdefaultlanguage{spanish}
	\setotherlanguage[numerals=eastern]{syriac}

\begin{document}

\begin{syriac}
ܫܠܴܡܳܐ 2008 \abjadsyriac{2008}
\end{syriac}

\end{document}
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