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which T/r we can use it mapping parmeter and mapping
variable? and which one is reusable for any mapping mapping
parmeter or mapping varibale?

Answer Posted / vijayb

What is T/r..?? is it Transformation..!!
If ur asking about transformation then Lookup Cache (named
and un-named) is a transformation which we can use in a
multiple mapping and also in same mapping in different
lookup.

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