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Check the data item to ensure that it is a valid request
check_data_item(data_item, type)
character; the data item to check
character; the type of data_item - one of "B Flow", "Legacy", or "REMIT"
boolean: returns true if data_item is valid, false if it is not
# NOT RUN { check_data_item("B1720", "B Flow") #valid check_data_item("B1720", "Legacy") #invalid - incorrect type check_data_item("B1111", "REMIT") #invalid - incorrect data item and type # }
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