| 摘要 |
In a hierarchical database in which a schema of a property is defined, a group-information creating unit creates group information that properties are automatically grouped based on their metadata. When a property is selected on a content display screen for change of its display position, a content aggregating unit aggregates values of the property and of the linked properties of it based on group information of the property. This allows an operator to operate easily to aggregate a subject property and another property related to the subject property, thereby reducing a workload of the operator.
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