Re: [xsl] Mapping via intermediate XML file problem

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Lech,

Since you are using XSLT 2.0, you can fall back to the actual name in 
the same XPath you use to look up a new name:

<xsl:element name="{($maps[@old = 
local-name(current())]/@new),local-name())[1]}">

This uses the idiom ($a, $b)[1] whereby the first item in $b is used 
when $a is empty.

If you want to generate a warning message, this is done easily with a 
conditional:

<xsl:if test="empty($maps[@old = local-name(current())]/@new)">
  ... generate your message ...
</xsl:if>

(A stricter test would check if your mapped name were a valid Qname, 
just in case.)

I hope this helps,
Wendell


At 09:41 AM 4/1/2008, you wrote:
> Hi.
>
> I'm doing a simple transformation, substituting some tags with
> different named ones and keeping the rest the same.
> Since there are many strange cases, I'd like to keep the mapping in
> the intermediate XML file (to keep the XSL clean), such as maps.xml:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <maps>
>     <map old="old-tag1" new="tag1"></map>
>     <map old="old-strange-tag2" new="tag2"></map>
>     <!-- <map old="" new=""></map> -->
> </maps>
>
> and then transform using:
>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
> version="2.0">
>
> <xsl:variable name="maps" 
> select="document('maps.xml')/maps/map"></xsl:variable>
>
> <xsl:template match="*">
>     <xsl:element name="{$maps[@old = local-name(current())]/@new}">
>         <xsl:apply-templates select="node()|@*"/>
>     </xsl:element>
> </xsl:template>
>
> </xsl:stylesheet>
>
> But when I run that through Saxon 9B it says "Invalid element name.
> Invalid QName {}" URL: http://www.w3.org/TR/xslt20/#err-XTDE0820
>
> My source file contains both the elements matched by map and other 
> elements too.


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
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