Question

I have this problem for xslt:

This is the input file:

  <root>
   <header/>
   <item/>
   … other n-1 <item/>
   <header/>
   <item/>
   … other m-1 <item/>
  </root>

so header and item are at the same level (/root).
it must be converted in something like:

<root2>
  <header2>
     <item2/>
     …<item2/> // the first n-items up
  </header2>
  <header2>
     <item2/>
     …<item2/> // the last m-items up
  </header2>
</root2>

so basically the first n-item must be moved in the first header while the second group of items must be moved in the second header. Any idea how to get this?

Thanks

Randomize

Answer 1

Sample XML:

<root>
    <header/>
    <item>1</item>
    <item>2</item>
    <item>3</item>
    <header/>
    <item>5</item>
    <item>6</item>
    <item>7</item>
</root>

XSLT using grouping:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output omit-xml-declaration="yes" indent="yes"/>

    <xsl:key name="k" match="item" use="count(preceding-sibling::header)"/>

    <xsl:template match="/">
        <root2>
            <xsl:apply-templates select="root/item[generate-id(.) = generate-id(key('k', count(preceding-sibling::header)))]" mode="a"/>
        </root2>
    </xsl:template>

    <xsl:template match="item" mode="a">
        <header2>
            <xsl:apply-templates select="key('k', count(preceding-sibling::header))"/>
        </header2>
    </xsl:template>

    <xsl:template match="@* | node()">
        <xsl:copy>
            <xsl:apply-templates select="@* | node()"/>
        </xsl:copy>
    </xsl:template>

</xsl:stylesheet>

Or simple particular XSLT:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output omit-xml-declaration="yes" indent="yes"/>

    <xsl:template match="/">
        <root2>
            <header2>
                <xsl:apply-templates select="root/item[count(preceding-sibling::header) = 1]"/>
            </header2>
            <header2>
                <xsl:apply-templates select="root/item[count(preceding-sibling::header) = 2]"/>
            </header2>
        </root2>
    </xsl:template>

    <xsl:template match="@* | node()">
        <xsl:copy>
            <xsl:apply-templates select="@* | node()"/>
        </xsl:copy>
    </xsl:template>

</xsl:stylesheet>

Both produce the same output:

<root2>
  <header2>
    <item>1</item>
    <item>2</item>
    <item>3</item>
  </header2>
  <header2>
    <item>5</item>
    <item>6</item>
    <item>7</item>
  </header2>
</root2>