Abstract
The basic data management method was proposed in order to carry out numerical analysis by reading XML documents which describe information of the irrigation pipeline. Concretely, the concept of the irrigation pipeline was regulated by RELAX in order to describe information in XML documents, and the classes of object oriented language Java which could handle information equal to these regulations were constructed automatically by Relaxer. The numerical analysis program could input information in the XML described with the via of objects which were created based on these classes documents as a data. By using this data management method, the labor of data input work was reduced, when engineers reexamined hydraulic function of irrigation pipeline by mading to combine some hydrology units, because the file of each hydrology unit already made in the design can be recycled.
