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Re: [xslt] Removing <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> from html output

On Tue, Jan 02, 2007 at 10:54:40PM -0500, T.G. Mutato wrote:
> You mean xsltproc adds the line only for html but not for xml output,
> right Daniel?

  Not really but I was wrong, see below :-)

> Using the following snippet of XML:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <pets>
>     <pet type="cat">Max</pet>
>     <pet type="parrot">Peter</pet>
> </pets>
> 
> If I then apply a minimal stylesheet with output set to html:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> 
>   <xsl:output method="html"  indent="yes" />
> 
>   <xsl:template match="/">
>     <html>
>     <head>
>     </head>
>     <body>
>     </body>
>     </html>
>   </xsl:template>
> 
> </xsl:stylesheet>
> 
> You'll see the following html output:
> 
> <html>
> <head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head>
> <body></body>
> </html>
> 
> Notice the meta tag is added, and not by the stylesheet but by the XSL
> processor.
> 
> Now if we just change the output in the stylesheet to xml:
> 
>   <xsl:output method="xml" indent="yes" />
> 
> We get the following output:
> 
> <?xml version="1.0"?>
> <html>
>   <head/>
>   <body/>
> </html>
> 
> Sounds like there is no way to turn off the meta tag for html output
> (and still have a head tag) so I'll look at making xml output work.

  I checked the code and yes the meta tag is added automatically if method
is 'html'. It's actually required by the spec in that case, see section :
  http://www.w3.org/TR/xslt#section-HTML-Output-Method

 "If there is a HEAD element, then the html output method should add a
  META element immediately after the start-tag of the HEAD element
  specifying the character encoding actually used."

So I guess the behaviour is right. I though this was done only for XHTML-1.0
output by libxml2, but in that case it's different, it's actually normal
to do it for html output I had forgotten about this.
XML processing in general is more stricly defined, it's better to use that
as the target format.

Daniel

-- 
Red Hat Virtualization group http://redhat.com/virtualization/
Daniel Veillard      | virtualization library  http://libvirt.org/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/
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