Function for Sort

mrame · September 23rd, 2008, 04:30 AM

Is there any function to Sort some text? I came through Xpath sort() function. But if I use it in Oxygen Editor, an error arise saying "unknown system function sort()". Actually I solved my problem, but I need to be clear of these functions.
Please provide some ideas.

Martin Honnen · September 23rd, 2008, 04:42 AM

With XSLT 1.0 and 2.0 you can process nodes (or in XSLT 2.0 items) in sorted order using the xsl:sort element, see http://www.w3.org/TR/xslt#sorting, where you put one or more xsl:sort elements as children of xsl:for-each or xsl:apply-templates (or xsl:for-each-group in XSLT 2.0).
In XSLT 2.0 there is additionally xsl:perform-sort http://www.w3.org/TR/xslt20/#creating-sorted-sequence

I don't think there is a sort function in pure XPath.

--
Martin Honnen
Microsoft MVP - XML

mrame · September 23rd, 2008, 04:54 AM

Thanks Martin. I'm interested in functions related to sort in xslt 2.0. Is there any method to do that through any of the functions present?

Martin Honnen · September 23rd, 2008, 05:01 AM

I have pointed you to the xsl:sort and xsl:perform-sort documentation. What else do you need?
If you need more help then show us the input you want to sort and the sorted result you want to achieve, then we can provide an example using xsl:sort.

--
Martin Honnen
Microsoft MVP - XML

mrame · September 23rd, 2008, 05:38 AM

<xsl:variable name="NotaValue">
        <xsl:apply-templates select="$repoSection//Figure" mode="Notation">
            <xsl:sort select="substring-after(unparsed-entity-uri(@entity), '.')"/>
        </xsl:apply-templates>
        <xsl:apply-templates select="$implSubTree//Figure" mode="Notation">
            <xsl:sort select="substring-after(unparsed-entity-uri(@entity), '.')"/>
        </xsl:apply-templates>
    </xsl:variable>

The above variable gives the value "dib,cgm,gif,cgm,jpeg,". I should sort this text. Is there any way?

Martin Honnen · September 23rd, 2008, 05:49 AM

Use

Code:

<xsl:variable name="sortedNotaValue" as="xs:string*">
  <xsl:perform-sort select="tokenize($NotaValue, ',')">
    <xsl:sort select="."/>
  </xsl:perform-sort>
</xsl:variable>

--
Martin Honnen
Microsoft MVP - XML

mrame · September 23rd, 2008, 06:01 AM

Thanks Martin. I missed tokenize(), when I was trying.

Martin Honnen · September 23rd, 2008, 06:11 AM

Depending on your data and your requirements it might suffice to change your original code to

Code:

<xsl:variable name="NotaValue">
        <xsl:apply-templates select="$repoSection//Figure | $implSubTree//Figure" mode="Notation">
            <xsl:sort select="substring-after(unparsed-entity-uri(@entity), '.')"/>
        </xsl:apply-templates>
</xsl:variable>

That way you might not need the second sorting step at all.

--
Martin Honnen
Microsoft MVP - XML

mrame · September 23rd, 2008, 06:17 AM

Thanks a lot Martin