Re: [xsl] XSLT2 test for null

[Abel Braaksma <abel.online@xxxxxxxxx>]

Hi David,

You can define this behavior yourself by selecting a default value, i.e.:

<xsl:param name="routeValues" as="node()" select="$default/routeValues"/>

Or like so:

<xsl:param name="routeValues" as="node()" >
<default />
</xsl:param>

If you don't specify a default value, the empty sequence is returned, if 
the as-attribute allows that.

Kind regards,
Abel Braaksma


On 3-3-2011 10:44, Merrilees, David wrote:
> Hi
>
> In XSLT2, how should I test for null, or empty parameters? For example, if I have<xsl:param name="routeValues" as="node()?" />  how should I test whether a value has been passed, or whether it's empty?
>
> Thanks
>
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