| 摘要 |
PURPOSE:To reduce the data amount of item constitution information and shorten a data update time by storing an item constitution information storage part with pairs of master components and slave components in master-slave relation and setting pointers which indicate the storage places of master and slave components in an item information storage part. CONSTITUTION:The item information storage part 1 is stored with an item name 21, characteristic information 22, a master pointer 23, a slave pointer 24, etc., as item information on each of components constituting a component list. Further, the item constitution information storage part 2 is stored with a master item 25, a slave item 26 and a next master item 27, and a next slave item 28 in pairs as item constitution information so as to indicate master-slave relation between the respective components in the item information storage part 1. In this case, the item constitution information is altered by updating one place of the item constitution information part and rewriting the respective pointers. Consequently, the data amount of the item constitution information is reduced and the data update time is shortened. |
