RE: passing parameters to XSL,what if no value in some

I can't help with the first part, because you are using a programming
language and transformation API of which I have no knowledge.

But for the second part, your XSLT code can define a default value for a
stylesheet parameter

<xsl:param name="x" select="'****'"/>

and if you choose an appropriate default value, this ensures that you can
detect when no value is passed, by testing against the default value. (It
does allow the user to pass the default value explicitly, but that's good
design practice anyway.)

Michael Kay
http://www.saxonica.com/

> -----Original Message-----
> From: himanshu padmanabhi [mailto:himanshu.padmanabhi@xxxxxxxxx]
> Sent: 06 March 2009 09:28
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  passing parameters to XSL,what if no value in
> some cases
>
> First time,code will go to 'else' part,it again returns to
> this form and 'if' part executes.
>
> <CODE>
>         my $parser = XML::LibXML->new();
>         my $xslt = XML::LibXSLT->new();
>
>         my $source = $parser->parse_file($xmlfile);
>         my $style_doc = $parser->parse_file($xslfile);
>
>         my $stylesheet = $xslt->parse_stylesheet($style_doc);
>         if($in{'flag'} eq "2") {
>             my $results = $stylesheet->transform($source,
> XML::LibXSLT::xpath_to_string(args => "$in{'args'}",val =>
> "1",new => "$in{'new'}"));
>             print $stylesheet->output_string($results);
>         }else{
>             my $results = $stylesheet->transform($source,
> XML::LibXSLT::xpath_to_string(args => "",val => "3",new =>
> "$in{'new'}"));
>             print $stylesheet->output_string($results);
>         }
> </CODE>
>
> 1.In my 'else' above,I don't want to pass 'args'(can I do it?),
>
> 2.How can I check in my xsl file whether it is passed or not
> probably using some 'if' statement or something like this?
> <CODE>
>     <xsl:choose>
>     <xsl:when test="args_is_given">
>          <some code>
>     </xsl:when>
>     </xsl:choose>
> </CODE>
>
>
> -----------------------------
> Regards,
> Himanshu Padmanabhi