parentheses Issue for Arabic

Hi All,

I have an xml file which after transformations generate .fo contains
paragraph like......

<fo:block space-after="0.4em">
                        mc_d_ cd]PD-Video out cd d^a HmGdGJ 525i (480i) Cf
525p (480p) Cf1125i (1080i) Cf750p (720p) Eal CLeRI NGQLmI. QGLZ ^Sc
<fo:inline id="d0e4822">GaJa]Rmfd</fo:inline> ]m Ga]Ua GaJGSZ! GaCLeRI
GaGNJmGQmI. </fo:block>
                  </fo:block>

Here I have to add tag as
<fo:bidi-override Unicode-bidi="embed" direction="ltr"> before opening
bracket "(" and closing tag </fo:bidi-override> after closing bracket ")".

How I will find the opening and closing brackets so that the tags get
applied in xsl?

Thanks,
Shailesh