Xsl:variable question

Hello,

If I declare more than one global variable in a document, can I be
ensured that the global variables will be instantiated in a particular
order?

For instance, if I do this,

<xsl:stylesheet>

	<xsl:variable name="A">
		some processing...
	</xsl:variable>

	<xsl:variable name="B">
		some processing dependent on B
	</xsl:variable>

	<xsl:variable name="C">
		some processing dependent on A,B,etc.
	</xsl:variable>

	<xsl:template match="/">
		transform
	</xsl:template>
</xsl:stylesheet>

Will I be ensured that C will be processed after B and after A,etc?

Thanks,

Matt