This seems to work fine:

<a>
<xsl:attribute name="href">
    ../build/new.aspx?file=<xsl:value-of select="Filename" />
</xsl:attribute>
[ edit ]
</a>

But I am trying to add some more values in the querystring but it always gives me errors, e.g.:

<a>
<xsl:attribute name="href">
    ../build/new.aspx?file=<xsl:value-of select="Filename" />&edit=true
</xsl:attribute>
[ edit ]
</a>

How can this be done? Thanks!

just use the entity &amp; in place of the & sign

I replied once but my post seems to have got lost in cyberspace along with my odd socks and last years pay rise the boss promised me.
As pgtips said you need to escape the ampersand but in strict HTML ampersand should be escaped in a document when in a url so you should double escape to &amp;amp;. Most browsers let you get away without doing this though.

--

Joe

or much cleaner ...

<a href="../build/new.aspx?file={Filename}&amp;edit=true">[ edit ] </a>