1. A method for outputting data of a diagnosis data stream of a printer or copier, the diagnosis data stream comprising first data of a first data type and at least second data of a second data type, the first data and the second data each including structure data and use data corresponding to the respective data type, comprising the steps of: supplying the diagnosis data stream to an evaluation program of an evaluation unit for evaluating the first and the second data; analyzing the structure data of the first data with aid of the evaluation program, a first identification which is characteristic of the first data type being determined; upon the determination of the first identification, selecting a first evaluation instruction from a plurality of evaluation instructions with aid of the evaluation program and loading it, the use data of the first data being evaluated with aid of the first evaluation instruction; verifying with aid of the evaluation program whether the evaluated first data include further data areas comprising the second data which can be evaluated with aid of a further second evaluation instruction which can be selected from the plurality of evaluation instructions; analyzing the second data with aid of the evaluation program, a second identification which is characteristic of the second data type being determined; upon the determination of the second identification, selecting said second evaluation instruction from said plurality of evaluation instructions with aid of the evaluation program and loading it, the second data being evaluated and output with aid of the second evaluation instruction; and the first data being generated by a first control unit, the second data being generated by a second control unit, and the control units controlling several parallel processes.