Patent US 5,159,552

A method for checking in a text processing system the correct and consistent use of units, comprising the steps of: storing a list of symbols or production rules that represent units; storing criteria, that state whether or not a symbol or a combination of symbols is interpreted as a unit; specifying allowable units and allowable notations thereof; searching the text for references to units, i.e., for strings that can be interpreted as a unit or part of a unit; checking whether the strings represent an allowable notation of an allowable unit; and generating an error signal, if not. If an unallowable unit is found, this unit and the associated number(s) may be transformed into an allowable unit.