How to pass "([^"]+)" as a parameter in p:xslt

Hi,

I'm trying to pass the regex "([^"]+)" as a parameter with p:xslt to match
on "stuff" in double quotes but having trouble getting the correct escaping.


THIS:
<p:with-param  name="regex" select='"([^"]+)"'/>

GIVES:
SEVERE:
file:/C:/XSLT/Project%20Files%20Form%2010-K/SRC/text/10K-RegexBased/processExecutionTesting/executions/createi4EnrichIns
xpl:970:54:err:XD0023:XPath syntax error at char 5 in {"([^"]+}:
    Unexpected token "]" beyond end of expression

THIS
<p:with-param  name="factRegex" select="&quot;([^&quot;]+)&quot;"/>

GIVES:
SEVERE:
file:/C:/XSLT/Project%20Files%20Form%2010-K/SRC/text/10K-RegexBased/processExecutionTesting/executions/createi4EnrichIns
xpl:970:54:err:XD0023:XPath syntax error at char 5 in {"([^"]+}:


How does one pass "([^"]+)" as a parameter in p:xslt?


Is there an equivalent to the following in xproc?
    <xsl:variable name="regex">
      <xsl:text>"([^"]+)"</xsl:text>
    </xsl:variable>


Executing with Calabash

Thanks
Alex Muir