RE: [xsl] is it possible to construct new xml with xsl ?

Hi.

1) The XML declaration is not a PI, correct. In the XPath data model, the
XML processing instruction is not available, so there's no way for a
portable XSLT 1.0 transformation to access it.

2) The DOM *allows* to report the XML declaration as PI, and this is what
MSXML's DOM does.

3) Microsofts "WD-XSL" language (and this is what the builtin stylesheet
uses) is not XSLT and does not use XPath (and this is why it can access the
XML declaration).


> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Michael
> Leditschke
> Sent: Monday, June 17, 2002 4:05 AM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] is it possible to construct new xml with xsl ?
>
>
> <snip/>
>
> > IE will assume the output of the transformation is meant to be
> > interpreted as
> > HTML. If you want collapsible views, you need to use a stylesheet
> > that will
> > produce the (D)HTML that makes the browser produce the view you
> want. See
> >   http://www.dpawson.co.uk/xsl/sect2/microsoft.html#d58e229
>
>
> I had a look at this stylesheet and have a concern about the
> way in which the XML declaration is being generated.
>
>
>
> To my knowledge, the XML Declaration is not a PI per the XML 1.0
> spec (section 2.6). Correct?
>
> Is it illegal for a parser to pass it through as a PI? I would
> have thought it was illegal given the BNF in the XML 1.0 spec.
>
>
> Conclusion -> No parser should pass the XML declaration to
>               an application.
>
>
>
> The XPath 1.0 data model is explicit in section 5.5 that
>
> "The XML declaration is not a processing instruction.
> Therefore, there is no processing instruction node
> corresponding to the XML declaration."
>
> The XSL spec adopts the XPath data model without mention
> of adding the XML declaration as a PI.
>
> Conclusion -> Even if a parser were allowed to pass the
>               XML declaration through as a PI, it is not
>               represented as such in the XSLT data model.
>
>
>
> Now, when displaying a file in IE using the referenced template,
> it does show the xml declaration as provided in the file. If
> no declaration in the file, there's none in the display, etc.
>
> The stylesheet has a template that starts
>
> <xsl:template match="pi('xml')">
>
> Given the above references, and the operation of IE,
> am I correct in assuming
>
>
> 1. MSXML is (incorrectly) passing through the XML declaration
> as a PI in order to render it per the stylesheet.
>
>
> OR
>
>
> 2. It's not just the stylesheet contributing to the displayed
> information. Some additional code must be being invoked to
> detect this stylesheet, and somehow get at and render the XML
> declaration information, which to my knowledge is supposed
> to be hidden from the application by the parser.
>
>
> I tried writing a stylesheet of my own looking
> for an 'xml' PI and tested it with IE, the results of which
> suggested MSXML is not passing through the declaration as a PI,
> so 2) above looks more likely.
>
> Source document
>
> <?xml version="1.0" encoding="UTF-8"?>
> <?xml-stylesheet type="text/xsl" href="hello.xsl"?>
> <greeting>Hello, world!</greeting>
>
>
> Stylesheet
>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>   <xsl:template match="/">
>     <html>
>       <head>
>         <title>XML Declaration test</title>
>       </head>
>       <body>
>         <p>
>           <xsl:choose>
>             <xsl:when test="processing-instruction('xml')">
> XML Declaration passed through as PI.</xsl:when>
>             <xsl:otherwise>
> XML Declaration not passed through as PI.</xsl:otherwise>
>           </xsl:choose>
>         </p>
>       </body>
>     </html>
>   </xsl:template>
> </xsl:stylesheet>
>
>
> Result
>
> <html>
> <head>
> <META http-equiv="Content-Type" content="text/html; charset=UTF-16">
> <title>XML Declaration test</title>
> </head>
> <body>
> <p>XML Declaration not passed through as PI.</p>
> </body>
> </html>
>
>
> If the stylesheet authors/modifiers are out there (Nate Austin or
> Jonathan Marsh), would you care to comment?
>
>
> Regards
> Michael
>
>
>
> BTW I tried the MS stylesheet out with SAXON 5.6.2, and as expected,
> the xml declaration information was missing in the resulting
> HTML.
>
>
>
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
>


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