Definition: (1) A spatial access method that defines hyperplanes, in addition to the orthogonal dimensions, which node boundaries may parallel. Space is split by hierarchically nested polytopes (multidimensional boxes with nonrectangular sides). The R-tree is a special case that has no additional hyperplanes. (2) A spatial access method that splits space by hierarchically nested polytopes. The R-tree is a special case in which all polytopes are boxes.
Generalization (I am a kind of ...)
tree, spatial access method.
Specialization (... is a kind of me.)
Aggregate child (... is a part of or used in me.)
Note: (2) by Jagadish after [GG98].
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Entry modified 12 February 2019.
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Cite this as:
Paul E. Black, "P-tree", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed. 12 February 2019. (accessed TODAY) Available from: https://www.nist.gov/dads/HTML/ptree.html