<xsl:if test="not($lastMonth=substring(editionDate,4,2))">
	  <xsl:variable name="numMonth" select="$numMonth+1"/>
	</xsl:if>
	

The scope of a variable binding is teh containing element which is teh
xsl:if here so you would not be able to use this variable outside that
xsl:if element.

> I can't make "numMonth" variable update with the correct increment out of

In common with ither declarative programming languages, xslt variables
can not change their value once bound.

If you said what you were trying to do someone could offer some XSLt
suggestions.

David

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