[4suite] More unexplained behavior of 4XLST

[Uche Ogbuji]

Bob Myers wrote:
> 
> Hi.  I am having no luck getting the <xsl:value-of> element to work.  (I am
> using version 0.9.0 of 4Suite, downloaded and installed a couple of days
> ago.)
> 
> % cat bug.xsl
> <?xml version="1.0"?>
> <xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>                version="1.0">
> 
> <xsl:template match="at">
>   <xsl:text><xsl:value-of select="@x"/></xsl:text>
> </xsl:template>
> 
> </xsl:transform>
> 
> % cat bug.xml
> <?xml version="1.0"?>
> <doc>
> <at x='1' y='2'/>
> </doc>

[snipped traceback]

Actually, there are two bugs here.  The first one is in your stylesheet.

xsl:text is not allowed to have any child tags.  Only character data
(text) (see section 7.3 of the spec).  Your stylesheet works as

<?xml version="1.0"?>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
               version="1.0">

<xsl:template match="at">
  <xsl:value-of select="@x"/>
</xsl:template>

</xsl:transform>

However, there is a buglet in 4XSLT: it should throw a more intelligent
message than the traceback you got.  This is an area we're really trying
to improve in 4Suite: error reports.  I've addressed illegal xsl:text
children thanks to your message.

> Whatever is causing the above bug is apparently also causing a bug in the
> use of the <xsl:number> instruction.

Hmm.  Can I have more info about your problems with xsl:number?  It
should be unrelated.

> PS.  This is part of an application I am developing to represent the
> Japanese game of go in xml, and the style sheet above is a fragment of one
> to convert such a game into an SVG graphic.  Such a graphic (created by
> other means) is attached for your amusement.

I checked it out with the Adobe viewer.  Very slick.  Are you planning
to use the animation features of SVG for things like illustrating moves?

Thanks.

-- 
Uche Ogbuji                               Principal Consultant
uche.ogbuji at fourthought.com               +1 303 583 9900 x 101
Fourthought, Inc.                         http://Fourthought.com 
4735 East Walnut St, Ste. C, Boulder, CO 80301-2537, USA
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