Re: [xsl] Correcting a prior error

[Michael Kay <mike@xxxxxxxxxxxx>]

I think you're out by one: the outermost element will have

count(ancestor::*|preceding::*)

equal to 0, but can be retrieved as (.//*)[1].

I think I would use

<xsl:key name="p" match="*">
<xsl:number level="any" count="*" from="/"/>
</xsl:key>

then

<xsl:variable name="posn">
  <xsl:number level="any" count="*" from="/"/>
</xsl:variable>

<xsl:variable name="val" select="document($src)/key('p', $posn)"/>


Michael Kay
Saxonica


On 30/07/2010 09:44, Dave Pawson wrote:
> I've been working with a series of xhtml like files, cleaning them up.
> It was a case of run an identity tranform, apply corrections.
> That was the theory.
> Luckily I kept a backup.
> I hastily created an incorrect version of the identity transform
> which omitted to copy the contents of any attributes.
>
> I'm left with the problem of how to correct it.
> Given
> directory A contains the files to be corrected.
> directory B contains the backup set of files.
>
> I want to match on
> "x:a[not(string(@href))]" I.e. those a elements with an empty href
> attribute.
>
> then copy across the value of the 'matching' href in the B directory,
> same file. I'm iterating through the files in A using
>
>   <xsl:for-each select="for $f in collection('/A?select=*.xml')
>                           return $f">
>   <xsl:result-document
>         href="{replace(base-uri(),'A','AA')}">
>         <xsl:apply-templates/>
>     </xsl:result-document>
> which creates the temporary directory AA with the corrections applied.
>
>
> the problem I'm finding is picking up the correct a element in
> the second file?
>
> Having found an empty a element
>
> I'm trying
>   <xsl:variable name="backup" select="'file:///B'"/>
>
>    <xsl:template match="x:a[not(@href)]">
>      <xsl:variable name="thisdoc" select="document-uri(/)"/>
>      <xsl:variable name="base"
> select="substring-after($thisdoc,'blg/')"/>
>      <xsl:variable name="src" select="concat($backup,'/',$base)"
> as="xs:string"/>   <!- this is the basename of the filename being worked
> ->
>
> <-this is an attempt to select the 'right' a element->
>      <xsl:variable name="posn" select="count(ancestor::*|preceding::*)"/>
>      <xsl:variable name="val"
>        select="(document($src)//*)[$posn]/@href"/>
>
>
>      <!-- Now copy this across -->
>      <x:a href="{$val}">
>        <xsl:value-of select="."/>
>      </x:a>
>    </xsl:template>
>
>
> Can anyone spot any obvious sillies please?
>
>
> regards
> ------------------------
> Dave Pawson
> http://www.dpawson.co.uk
> XSLT, XSL-FO and docbook FAQ