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Jan 29, 2009 at 06:35 PM

Underscore declaration

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While debugging one of the sap standard program i came across the following declaration

data: __seqta_tab type seqta occurs 01 with header line,
      __scope type ddenqscope,
      __wait type ddenqwait.
__wait = _wait.
__scope = _scope.

My question what is the significance of __ (2 underscore) & _ (1 underscore) declaration?