A recording medium, recording and information processing apparatus and methods by which efficient processing of data and a high processing speed can be readily achieved at lower cost. The developing unit includes an image carrier on which an electrostatic latent image is formed, a developing member to supply a developer to the image carrier, and a first cleaning member having a first cleaning blade to remove a non-transferred developer on the image carrier. In another aspect, a method for configuring a programmable logic controller having a protocol includes utilizing the schema to validate at least one XML file parsed from a comma separated variable file created by a configuration tool for a protocol different than the protocol of the PLC.