3. A document processing apparatus comprising: means for extracting a format of a stored document used as a standard; means for storing the extracted format in order to automatically edit another document; and document data storage means for storing document data representing said document used as the standard, said document data including character data and modification information; said extracting means further comprising modification information extracting means for reading out the document data from said document data storage means, with said document data being divided in units of constituent element information into document blocks, and for extracting the modification information from said document blocks; and said storing means further comprising modification information storing means for storing, for each document block, the extracted modification information together with the constituent element information, said another document being edited with reference to the constituent element information and the modification information stored in said modification information storing means.
3. A document processing apparatus comprising: means for extracting a format of a stored document used as a standard; means for storing the extracted format in order to automatically edit another document; and document data storage means for storing document data representing said document used as the standard, said document data including character data and modification information; said extracting means further comprising modification information extracting means for reading out the document data from said document data storage means, with said document data being divided in units of constituent element information into document blocks, and for extracting the modification information from said document blocks; and said storing means further comprising modification information storing means for storing, for each document block, the extracted modification information together with the constituent element information, said another document being edited with reference to the constituent element information and the modification information stored in said modification information storing means. 4. An apparatus according to claim 3, wherein said constituent element information includes at least date and information indicating sender and destination, and said modification information includes at least character size and information representing underlining.