| 摘要 |
Registration and retrieval of a data set related with a hierarchically-organized identifier and a descendant data set related with an identifier(s) hierarchically lower than the first identifier are improved. Identifier and data are entered pair-wise to a data processing device associated with an identifier. An identifier-related memory stores a record containing an identifier, a data set (group of data related with the identifier), and a descendant data set. The descendant data set is a union of data sets related with the identifier or identifiers hierarchically lower in order than the first identifier. A data registering processor adds received datum to a data set of any of the records stored in the identifier-related data memory if the received identifier is that of the record. The data registering processor also adds received datum to the descendant data set of a record having an identifier hierarchically higher in order than the received identifier.
|
