A developing roller includes a cylindrical sleeve that holds developer on a peripheral surface thereof, and a magnet roller being provided in the sleeve and having a plurality of magnetic poles. In this apparatus, a modulator modulates data and outputs to a first spreader. This dual-representation common message format allows standard XML tools to be utilized in viewing and editing XML-based data and allows a CMF parser to be utilized to convert the XML formatted information into an extensible binary representation for actual communication through a medium or storage on a wide range of media.