Since Qixite version 0.0.9 site wide variables are saved as XML elements "Variable" with two parameters "Name" and "Value". These elements are added directly to Qixite node.
Accessing Site Wide Variables in Templates
In order to access Site Wide Variable in your template you have to use the following code:
<xsl:value-of select="/Qixite/Variable/@Value[../@Name="YourVariable"]"/>
If you just want to test if some Site Wide Variable is set you shoould use the following code:
<xsl:if test="/Qixite/Variable/@Name="YourVariable"">
</xsl:if>
</xsl:if>