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].
If you have suggestions, corrections, or comments, please get in touch with Paul E. Black.
Entry modified 16 November 2009.
HTML page formatted Tue Dec 6 16:16:32 2011.
Cite this as:
Paul E. Black, "P-tree", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed., U.S. National Institute of Standards and Technology. 16 November 2009. (accessed TODAY) Available from: http://www.nist.gov/dads/HTML/ptree.html