| 摘要 |
PROBLEM TO BE SOLVED: To enable modifications of attributes, relations, and procedures to an object independently of schema definition information in an object-oriented database. SOLUTION: Objects and component objects which hold the modification information of the objects are stored in a database 107 which is managed by a component object management part 102 and an object management part 103. The definition information of objects and component objects which hold modification information of the definition information are stored in a dictionary 108 which is managed by a dictionary management part 104. In response to users' requests, a view management part 101 manages views for dynamically generating the definition information of objects after definition modification and the objects through management parts 102, 103 and 104. An update history management part 105 extracts the modification histories of objects from component objects and outputs them to a journal 106. COPYRIGHT: (C)2005,JPO&NCIPI
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