[xsl] Alternate syntax

[Steve <subsume@xxxxxxxxx>]

Hey list,

Keep in mind, I'm open to the smallest suggestions on anything below,
even if unrelated.

Anyway, I have the following snippet:

<xsl:variable name="warning">
	<warning>New contacts may only be added to active consumers.</warning>
</xsl:variable>
<xsl:call-template name="warning">
	<xsl:with-param name="warning" select="$warning" />
       <xsl:with-param name="level">3</xsl:with-param>
</xsl:call-template>

I don't like it. I'd rather do it in one fell swoop, a la:

<xsl:call-template name="warning">
	<xsl:with-param name="warning">
       	<warning>New contacts may only be added to active consumers.</warning>
      </xsl:with-param>
       <xsl:with-param name="level">3</xsl:with-param>
</xsl:call-template>

But my template complains: Reference to variable or parameter
'warning' must evaluate to a node list.

Template below.
	<xsl:template name="warning">
		<xsl:param name="warning"
select="document(concat($root,'/warning.asp?userID=',$userID))/Records/Record"
/>
		<xsl:param name="level" >
			<xsl:choose>
				<xsl:when test="number($warning/level) = $warning/level">
					<xsl:value-of select="$warning/level" />
				</xsl:when>
				<xsl:otherwise>2</xsl:otherwise>
			</xsl:choose>
		</xsl:param>
		<xsl:if test="$warning">
			<span class="screen">
				<fieldset class="warning{$level}">
					<ul>
						<xsl:for-each select="$warning/warning">
							<li><xsl:copy-of select="." /></li>
						</xsl:for-each>
					</ul>
				</fieldset>
			</span>
		</xsl:if>
	</xsl:template>

Also, I'm all about syntax efficiency. Are there any other shortcuts I
could take besides the one I'm looking for?

-Steve