| 摘要 |
PROBLEM TO BE SOLVED: To store data so that data to be used for processing are continuously read for the data having a hierarchical structure.SOLUTION: For data having the hierarchical structure and including tuples each including a combination of different data types and lists as sequences of the same data type, attribute-based data are divided and stored in files, and the data structure is held as schema information 105. The schema information 105 holds data types of respective elements on the hierarchical structure, and as to data types of list elements, holds a data type of a top element. In the attribute-based data 106, attribute-based files are managed to be in order by a file name management table. Data on each attribute are stored in a file in a state of being hierarchized in a list structure corresponding to the depth of the list of the schema information 105. When performing analysis processing 203: a required attribute is specified; files of only the specified attribute are opened; the data structure is restored using the schema information 105; and data analysis processing is performed. |
