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In XSL, you do have variables but you cannot assign them values at runtime, so I suppose it would be more approriate to call them constants. XSL does have one useful function that returns a number which corressponds to the number of times a loop has occurred:

<xsl:for-eachselect="people/person">    <xsl:value-ofselect="position()"/></xsl:for-each>

Anyway, getting back to variables, you declare them like this:

<xsl:variable name="myvar">myvalue</xsl:variable>

To get the value of a variable use:

<xsl:value-of select="$myvar"/>

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