| 摘要 |
A method of operating a nodal data processing system comprising a plurality of nodes connected by communications links, the nodes being arranged in a hierarchical structure having higher and lower levels, wherein data communicated between the nodes is divided into time series data and fact data, time series data is communicated from a node to a node at a higher level in the hierarchy, and fact data is communicated from a node to a node at a lower level in the hierarchy.
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