RE: [xsl] Mysterious appearance of xmlns="" in output

> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Steve
> Rosenberry
> Sent: Friday, March 08, 2002 8:30 PM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Mysterious appearance of xmlns="" in output
>
>
>
> Well hopefully it's only mysterious to me...

Yep.

> I get extra xmlns="" attributes in different HTML tags in the output
> generated by MSXML4.  I've reduced the problem to the following XSLT:
> ---------------------------------------------------
> <?xml version="1.0" encoding="UTF-8"?>
>
> <xsl:stylesheet version="1.0"
>   xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>
>   <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
>
>   <!-- VERY SIMPLE ROOT TEMPLATE MAKES A SINGLE CALL TO Header-->
>   <xsl:template match="/">
>
>     <html xmlns="http://www.w3.org/1999/xhtml"; lang="en" xml:lang="en">
>
>       <xsl:call-template name="Header"/>
>
>     </html>
>
>   </xsl:template>
>
>   <!-- HEADER TEMPLATE SIMPLY OUTPUTS A BASIC HTML Head TAGSET-->
>   <xsl:template name="Header">
>
>     <head>
>       <meta http-equiv="Content-Type" content="text/html;

Make this:

	<meta xmlns="http://www.w3.org/1999/xhtml"; http-equiv="Content-Type"
content="text/html;

>            charset=iso-8859-1"/>
>       <title>Title</title>
>     </head>
>
>   </xsl:template>
>
> </xsl:stylesheet>
> ---------------------------------------------------
>
>
> I expected the following output from the transformation:
> ---------------------------------------------------
> <?xml version="1.0" encoding="UTF-8"?>
> <html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml";>
>   <head>
>     <meta http-equiv="Content-Type"
>           content="text/html;
>           charset=iso-8859-1" />
>     <title>Title</title>
>   </head>
> </html>
> ---------------------------------------------------
>
> What I get instead is a 'head' tag that looks like this:
>
>     <head xmlns="">
>
> If I replace the <xsl:call-template name="Header"/> with the contents
> >from the Header template, the xmlns attribute is NOT inserted.
>
> If I remove the xmlns="http://www.w3.org/1999/xhtml"; attribute from the
> <html> tagset and leave the <xsl:call-template name="Header"/>, the
> xmlns attribute again is NOT inserted.
>
> If I go back to inserting the <head> tagset with a call-template and
> change the Header template to the following (I know it's invalid HTML,
> but for testing purposes I don't believe that should matter):
> ---------------------------------------------------
>   <xsl:template name="Header">
>
>     <head/>
>       <meta http-equiv="Content-Type" content="text/html;
>            charset=iso-8859-1"/>
>       <title>Title</title>
>
>   </xsl:template>
> ---------------------------------------------------
>
> I get three extra xmlns="" attributes as follows:
> ---------------------------------------------------
> <?xml version="1.0" encoding="UTF-8"?>
> <html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml";>
>   <head xmlns="" />
>     <meta http-equiv="Content-Type"
>         content="text/html;
>         charset=UTF-8"
>         xmlns="" />
>     <title xmlns="">Title</title>
> </html>
> ---------------------------------------------------
>
> Does anyone understand this behaviour, and more importantly does anyone
> know how I can turn it off without sacrificing call-templates or the
> xmlns namespace definition?  Actually for that matter, I'm not sure what
> the xmlns namespace definition does for me.  I added it when I converted
> the website to XHTML just because I blindly copied from an example
> somewhere.  If I can sacrifice that without violating any spec, I will,
> although, I'd still like to understand what's happening...

It's just a matter of default namespace scoping. You could also add the
declaration to the stylesheet element (then you wouldn't have to repeat it).



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