Re: [xsl] Transform XML to XML

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Mike,

At 04:54 AM 8/26/2005, David wrote:
>         I guess, like security best practices, my mindset is "don't
>        allow it unless I explicitly ask for it."
>         But I guess it doesn't work that way so I shouldn't fight it.
>
> I typically begin every stylesheet with a template that looks like
>
> <xsl:template match="*">
> <xsl:message>Unsupported element: <xsl:value-of 
> select="name()"/></xsl:message>
> </xsl:template>
>
> and so have to keep adding templates until my stylesheet stops moaning
> on all test cases.

Notice that this override of the built-in default template of David's also 
has the effect of stopping processing of the tree for branches where it 
matches (that is, for templates not matched by a "better" template). So 
until he writes a template to match an element, that element and its 
contents are now *suppressed* by default.

He could work in a somewhat less draconian fashion (at the cost of seeing 
many more of these messages early on) if his template had:

<xsl:template match="*">
  <xsl:message>Unsupported element:
   <xsl:value-of select="name()"/></xsl:message>
  <xsl:apply-templates/>
</xsl:template>

Finally, in order to see how this all hangs together one needs to 
understand how the processor decides which template to use when several 
templates match a node....

Cheers,
Wendell


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
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Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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