This goes into the Mapping Code field of a Data Load Mapping. The intent is to pass any parameters that may be being used in the Interface.
***Please note that the Target must = "YOURQUERY.WhateverParameterName ". This tells Meridium what parameter values to use for a given row.
DLSRC_YOURQUERYSOURCENAME_LookupKeys("PARAM_NAME")= AutoTrim(src("Excel_Column_Name"))