$xmldoc = @"
<orgchart>
<shape id="0" name="Akuma" />
<shape id="1" name="Ryu" parentid="0"/>
<shape id="2" name="Ken" parentid="0"/>
<shape id="3" name="Chun-Li" parentid="2"/>
</orgchart>
"@
$filename = "d:\model.xml"
$xmldoc | out-file $filename
$model = Import-VisioModel -Filename $filename
$model | Out-Visio