RE: [xsl] Node-sets using <xsl:with-param>

["Michael Kay" <mhk@xxxxxxxxx>]

Your recursive call on the template with mode=modify

              <xsl:apply-templates mode="modify">
>                  <xsl:with-param name="id1" 
> select="$newid"></xsl:with-param>
>              </xsl:apply-templates>

does not set the $curnode parameter. This means it will take its default
value, which is a zero-length string. Doing an apply-templates on a
zero-length string will give you a type error.

Michael Kay

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Mir Farooq Ali
> Sent: 22 January 2004 17:11
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: Re: [xsl] Node-sets using <xsl:with-param>
> 
> 
> G. Ken Holman wrote:
> 
> > At 2004-01-22 00:26 -0500, Mir Farooq Ali wrote:
> > 
> >> I'm getting an error when trying to pass the current node into a
> >> template using <xsl:with-param name="current" 
> select="current()"/> or 
> >> <xsl:with-param name="current" select="."/>
> >>
> >> The place where I'm trying to access it
> >> <xsl:apply-templates mode="structure1" select="$current"/> 
>  is where
> >> I'm getting an error message using Saxon indicating that 
> the select 
> >> attribute is expecting node and what it's getting is xs:string.
> >>
> >> What am I doing wrong here?
> > 
> > 
> > I think we need more code fragments to see ... nothing strikes me as
> > incorrect in the two snippets you've given.
> > 
> > If you are using <xsl:with-param/> inside of <xsl:apply-templates/> 
> > (you
> > don't say if you are using <xsl:call-template or not) make sure you 
> > don't have any built-in templates being triggered between 
> the processing 
> > of the two templates.  If so, the built-in template will 
> not pass the 
> > node parameter, the template with the parameter declaration 
> will get 
> > called by the built-in template with no parameters, the 
> default value 
> > for an empty parameter declaration is string, and you will 
> have an empty 
> > string passed for the <xsl:apply-templates/>.
> > 
> > But that is just a guess based on your evidence.
> > 
> > I hope this helps.
> > 
> > ......................... Ken
> 
> This is my stylesheet
> 
> <?xml version="1.0" encoding="UTF-8" ?>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
> version="1.0">
>      <xsl:strip-space elements="*" />
>      <xsl:output method="xml" indent="yes" />
>      <xsl:variable name="maindoc" select="/" />
>      <xsl:template match="TM">
>          <UI>
>              <STR>
>                  <xsl:apply-templates select="T" mode="structure1" />
>              </STR>
>          </UI>
>      </xsl:template>
>      <xsl:template match="T" mode="structure1">
>          <xsl:variable name="id" select="@Identifier" />
>          <xsl:variable name="ttm" select="./Type" />
>          <xsl:variable name="tc" select="@Category" />
>          <xsl:variable name="uc" select="./Prefs/UC" />
>          <xsl:variable name="ups" select="./Prefs/UPS" />
>          <xsl:for-each select="document('lookup.xml')">
>              <xsl:variable name="current" select="." />
>              <xsl:apply-templates mode="modify" select="/TM/
>                 TC[@name=$tc]/
>                 TTM[@type=$ttm]/
>                 UCM[@prefnum=$uc]/
>                 UPS/part[@prefnum=$ups]/*">
>                  <xsl:with-param name="id1" select="$id"/>
>                  <xsl:with-param name="curnode" select="."/>
>              </xsl:apply-templates>
>          </xsl:for-each>
>      </xsl:template>
>      <xsl:template mode="modify" match="*">
>          <xsl:param name="id1"></xsl:param>
>          <xsl:param name="curnode"></xsl:param>
>          <xsl:variable name="idd" select="translate($id1,' 
> ','_')"></xsl:variable>
>          <xsl:variable name="newid" select="concat($idd, 
> position())"></xsl:variable>
>          <part class="{name()}" id="{$newid}">
>              <xsl:apply-templates mode="modify">
>                  <xsl:with-param name="id1" 
> select="$newid"></xsl:with-param>
>              </xsl:apply-templates>
>              <!--xsl:apply-templates mode="structure1" 
> select="$curnode" 
> /--> <!-----******* Error on this line here -->
>          </part>
>      </xsl:template>
>      <xsl:template match="Prefs|Type" mode="structure1" /> 
> </xsl:stylesheet>
> 
> The error line is indicated above.
> 
> Ken, could you please elaborate on what the built-in template rule is 
> for the situation above? I read the XSLT 1.0 spec, but couldn't fully 
> understand what it says.
> 
> Thanks,
> 
> -Farooq.
> -- 
> Mir Farooq Ali
> 
> Computer Science, Virginia Tech,
> Email: miali@xxxxxxxxx
> Web: http://purl.org/net/farooq
> --------------------------------------------
> (c) 2004 Mir Farooq Ali  All rights reserved
> --------------------------------------------
> 
> 
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> 


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