Method for generating hierarchical specification information from software

摘要

The present invention is a method for extracting and generating hierarchical specification information in which the derivative of data included in already-developed software is hierarchically related and the reusability of data which is stored together with a relating procedure is high. In the method of the present invention, an existing program is analyzed and a data item and a procedure are extracted, and a procedure relating to a data item is stored in relation to the data item, and data items sharing a used area, data items for transferring data, or comparison items are stored as similar items in relation to each other, and key items are selected from the similar items, and a hierarchical specification in which the selected key items are set is generated, and dependent data items are selected from a record having the data items related to the key items, and the selected data items are added as attribute data of the hierarchical specification.