| 摘要 |
PURPOSE:To eliminate that all the constitution units of a program is processed even if only a part of the constitution unit is changed and to shorten the processing time of source generation by controlling the history such as the number of versions of constitution units at the time of generating a source on the source. CONSTITUTION:Data of a graphic history storage means 1-3 and data of a source history storage means 1-6 are all corresponded in terms of sheets. Consequently, data in the constitution units, which are to be processed, for generating a partial source can be stored in a data storage means 1-9 in processing constitution units and the constitution units to be processed can be detected. Thus, that all the constitution units of the program are not processed even if only a part of the constitution units is changed is eliminated, and much processing time is not spent for the generation of the source with a few change.
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