There was an old style to use the next transformmap variable reference name format: varName[.partName]].
Currently it is deprecated. The variable reference name should starts from '$' then the name of referenced variable at
the end there could be '.' and message part name.

The value of source and result attributes of <transform element and attribute value of <param element constructs with
type="param" should be of the next format: $varName[.partName]].


So here are two validation rules:
1. Wrong variable reference format.
2. Deprecated variable reference format.(i.e. all correct except '$' on the first place - varName[.partName]])

e.g.:
correct: 
<transform file="newXSLFile4.xsl" source="$inOpVar1.part1" result="$outOpVar1.part1" name="Transform1">
    <param name="param1" type="param" value="$inOpVar1.part2"/>
</transform>

rule 1 is broken: (!!!wrong  $inOpVar1.)
<transform file="newXSLFile4.xsl" source="$inOpVar1." result="$outOpVar1.part1" name="Transform1">
    <param name="param1" type="param" value="$inOpVar1.part2"/>
</transform>

rule 2 is broken:
<transform file="newXSLFile4.xsl" source="inOpVar1.part1" result="outOpVar1.part1" name="Transform1">
    <param name="param1" type="param" value="inOpVar1.part2"/>
</transform>