Re: number collapsing

range.xml

<a>
<r><x>1</x><x>3</x><x>5</x><x>7</x></r>
<r><x>1</x><x>2</x><x>3</x><x>4</x></r>
<r><x>1</x><x>2</x><x>3</x><x>8</x></r>
</a>


range.xsl
<xsl:stylesheet
   version="2.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>

<xsl:template match="r">
<xsl:text>
[</xsl:text>
<xsl:for-each-group select="x" group-adjacent="if (position()=1 or .=preceding-sibling::x[1]+1) then -1 else position() ">
<xsl:value-of select="."/>
<xsl:if test="current-group()[2]">
<xsl:text>-</xsl:text>
<xsl:value-of select="current-group()[last()]"/>
</xsl:if>
<xsl:if test="position()!=last()">,</xsl:if>
</xsl:for-each-group>
<xsl:text>]</xsl:text>
</xsl:template>


</xsl:stylesheet>



$ java -jar ../saxon8/saxon8.jar  range.xml range.xsl
<?xml version="1.0" encoding="UTF-8"?>

[1,3,5,7]

[1-4]

[1-3,8]


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