Data management system, data management device, data management method, and storage medium
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United States of America Patent
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Aug 23, 2022
Grant Date -
Sep 14, 2017
app pub date -
Sep 3, 2015
filing date -
Sep 9, 2014
priority date (Note) -
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Abstract
A data management system includes: a tree-structure-holding means for storing a transformed tree structure into which an original tree structure has been transformed by a rotation operation, the original tree structure being a tree structure indicating hierarchical inclusion relations among data sets associated with nodes; an inter-data-relation-holding means for storing a reverse link, the reverse link being a link between nodes the levels of which have been reversed by the rotation operation; and an inter-link-relation-holding means for storing a temporarily placed link in association with the reverse link, the temporarily placed link being a link to a node that has been transferred from immediately below an ex-lower-level node to immediately below an ex-upper-level node, the ex-lower-level node and the ex-upper-level node being nodes the levels of which have been reversed.
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