BizTalk Maps: Does Custom xsl support the document function of XSLT

Hi,

I would like to know if the document function (xslt) is supported within a BizTalk Map if I use Custom xsl.

The document function in xslt allows me to access more than 1 xml file for the xsl stylesheet.

I am able to use the document function in DotNet successfully, but not in BizTalk Maps.

I had an inputxml, outputxml, customxsl, samplexml(additional xml file to pick values) 

E.g. sample.xml – has the values to be parsed and placed in the map.
****************

<? xml version="1.0" encoding="utf-8" ?>
<RootNode>
<Node1>value1</Node1>
<Node2>value2</Node2>
</RootNode>
********
And in my xsl stylesheet I try to get the values
******

<xsl:variable name="var1" select="document('<Drive>:\Folder\sample.xml')/RootNode/Node1"/>
…
<OutputNode><xsl:value-of select="$var1"/></OutputNode>

******

But my output that I am getting: <OutputNode/> – means the nodes arent being accessed.

But when I try and use the Transform function in Dot Net ( using system.xml, system.xml.xpath,system.xml.xsl) ( stimulates the mapper functionality) 

Map.Load(Mapxsl) 

Mapl.Transform(Inputxml, Outputxml)

In the Output xml I get <OutputNode> Some value </OutputNode>

I am not sure why the same xsl code works while using DotNet and not BizTalk Maps-custom xsl.

Thanks