Function: lookup()

Triggers a lookup on a specified pipe.

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Performs a lookup down the in pipe. The value held in the $num variable will be used to evaluate the expression in which $num is used in, e.g. pipe or collector expression.

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Performs a lookup down the in pipe. The value held in the $num variable is set to equal the BNumber of the current candidate set being processed. This will be used to evaluate the expression in which $num is used in, e.g. pipe or collector expression.

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Performs a lookup down the in pipe. The values held in the $num and $band variables are set to equal the BNumber and BandingModel values of the current candidate set being processed. These will be used to evaluate the expression in which $num and $band are used in, e.g. pipe or collector expression.

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