Your question isn't really very clear but I guess something like this:
a) you appear to be generating html or xhtml in which case you don't
want selected="true" as that would be invalid, you want
selected="selected".
b) take the identity transformation (from the XSLT rec, or the faq or
archives of this list) then add
<xsl:template match="option[(_at_)value=3]">
<option select="selected">
<xsl:copy-of select="@*|node()"/>
</option>
</xsl:template>
David
________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________