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Re: stylesheets without match="*" templates

Subject: Re: stylesheets without match="*" templates
From: David Carlisle <davidc@xxxxxxxxx>
Date: Wed, 12 Nov 2008 12:08:03 GMT
Re:  stylesheets without match="*" templates
> If such a template is used, the structure of the result sequence will be 
> similar to the input structure and it is sure that the outpult will be 
> valid XML as there is only one root node (if the input is valid xml).

No there can only ever be one root node (renamed to "document node" in
Xpath 2) You mean the elements which have this node as parent.

XSLT stylesheets produce what XMl REC calls an external parsed entity,
which basically is like an XML document but without the restriction on
only having one top level element.

There are various factors that effect whether one or more such elements
are produced and the presence or not of <xsl:template match="*"> is only
very marginally related to that.

For example if you have

<xsl:template match="/">

then the result tree will only have one top level element whether or not 
<xsl:template match="*"><xsl:copy> occurs.

conversely if you have

<xsl:template match="/">
     <xsl:copy-of select="."/>
    <xsl:apply-templates mode="b"/>

then the result tree will not have one top level element whether or not 
<xsl:template match="*"><xsl:copy> occurs.

> Without going into detail, it's difficult for me to put these nodes into 
> the right order, because their order can't be deduced from the
> templates.

The usual way of converting an external parsed entity into a document,
is just to wrao the whole lot in an elemnt, if you can not handle


then treat it as if it were


either by implictly doing that or by modifying the input.

> My question to you is: In practise, how many stylessheets of the second 
> type without a template like the one above exist?

lots:-) that is the identity template so it is only relevant if the
input is using the same vocabulary as the output, and very often the
point of transformation is to change vocabularies. But the top level
structure is more directly related to the templates matching "/" than
templates matching "*".


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