Re: Expensive XSLT2 - suggestions for improving?

<xsl:template match="value">
  <xsl:copy>
    <xsl:apply-templates select="@*"/>
    <xsl:for-each select="key('oid-by-value',.)[1] except .">
      <!-- traverse to the @oid of the first element with the
           same value, unless this is it -->
      <xsl:attribute name="refoid" select="string()"/>
    </xsl:for-each>
    <!-- skip content -->
  </xsl:copy>
</xsl:template>

Cheers,
Wendell

Hello experts,

The task is to remove duplicate text content before moving an XML file
into translation. After the translation, the former duplicate content
should be recreated.

Assume this input XML (I dropped a lot of attributes):

<Doc>
<value oid="40068">Lasttrennschalter</value>
<value oid="40069">Umbau von N12 auf N4</value>
<value oid="4006a">Lasttrennschalter</value>
</Doc>

The third <value> should be empty because its content is identical to
the first, but we need a pointer to that first element to be able to
recreate the content after translation. Also, all original attributes
must stay unchanged. Therefore in each duplicate I insert an extra
attribute @refoid with the @oid of the source element. So I get this:

<Doc>
<value oid="40068">Lasttrennschalter</value>
<value oid="40069">Umbau von N12 auf N4</value>
<value oid="4006a" refoid="40068"/>
</Doc>

My XSL is very simple and works as intended, but it does not scale
very good, I guess because I look at preceding::value so many times:

<!-- Condenser: modify all duplicates -->
<xsl:template match="value[.=preceding::value]">
  <xsl:copy>
    <xsl:apply-templates select="@*"/>
    <xsl:attribute name="refoid"
      select="preceding::value[.=current()][last()]/@oid"/>
    <!-- skip content -->
  </xsl:copy>
</xsl:template>

<!-- pass-through all nodes and attributes -->
<xsl:template match="@*|node()">
  <xsl:copy>
    <xsl:apply-templates select="@*|node()"/>
  </xsl:copy>
</xsl:template>

I guess a clever constructed key could help a lot... any pointers are
very welcome!

======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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