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Topic: Patricia trie


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In the News (Thu 24 Dec 09)

  
  Debian -- libnet-patricia-perl   (Site not responding. Last check: 2007-10-12)
This module uses a Patricia Trie data structure to quickly perform IP address prefix matching for applications such as IP subnet, network or routing table lookups.
Patricia stands for "Practical Algorithm to Retrieve Information Coded as Alphanumeric", and was first suggested for routing table lookups by Van Jacobsen.
Patricia Trie performance characteristics are well-known as it has been employed for routing table lookups within the BSD kernel since the 4.3 Reno release.
packages.debian.org /unstable/perl/libnet-patricia-perl.html   (182 words)

  
 CSC 316 [Summer II 2006] - Lecture 15
A PATRICIA trie is a variant of the trie data structure which only store records at the leaf nodes and use internal nodes for branching.
This is done by indicating at each trie node an indication of which 'bit' or 'character' position to compare next.
If a PATRICIA trie is being searched, there is the extra step of checking which character to search with next (and making sure that the search key is long enough to check that character).
www4.ncsu.edu /~kbdamm/csc316/lectures/15.html   (603 words)

  
 Patricia Tries in the Context of Dynamical Systems
A Patricia trie is a trie from which all unary nodes are eliminated.
The path length of a tree is the sum of the depths of all (nonempty) external nodes.
For the average value of the size, a Patricia trie turns out to be better than a trie, and Rényi's condition is not necessary.
algo.inria.fr /seminars/sem00-01/bourdon.html   (1390 words)

  
 Class: Trie
Trie.find_prefix will in some (most) cases return Trie objects that are not members of the root Trie.
Trie, passing the the key and value as parameters.
Insert an value into this Trie, keyed by the passed-in key, which can be any sort of indexable object.
gemjack.com /gems/trie-0.0.1/classes/Trie.html   (861 words)

  
 Net::Patricia - Patricia Trie perl module for fast IP address lookups - search.cpan.org
If a matching node is found in the Patricia Trie, this method returns the user data for the node.
If the matching node is found in the Patricia Trie, it is removed, and this method returns the user data for the node.
So, if you are currently relying on the climb return value to accurately report a count of the number of nodes in the Patricia Trie, it would be prudent to have your subroutine return a non-zero value.
search.cpan.org /~plonka/Net-Patricia-1.014/Patricia.pm   (1495 words)

  
 Topic #7: Tries and suffix trees
This type of trie resembles the one in figure 2 except that chains which lead to leaves are trimmed.
The heights of the ordinary trie or the compact trie are not necessarily bounded by n.
The idea behind suffix TRIE is to assign to each symbol in a text an index corresponding to its position in the text.(ie: First symbol has index 1, last symbol has indice n= #of symbols in text).
www.cs.mcgill.ca /~cs251/OldCourses/1997/topic7   (1840 words)

  
 trie   (Site not responding. Last check: 2007-10-12)
There are some who, in a sadly misguided attempt to verbally distinguish a trie from the more general tree and in contrast to typical English pronunciation (of which calorie, eerie, and reverie are examples, but die, lie, and pie are not), pronounce the name "try".
Go to the Dictionary of Algorithms and Data Structures home page.
Paul E. Black, "trie", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed., U.S. National Institute of Standards and Technology.
www.nist.gov /dads/HTML/trie.html   (201 words)

  
 Patricia tree   (Site not responding. Last check: 2007-10-12)
Definition: A compact representation of a trie where any node which is an only child is merged with its parent.
A radix tree is taken to be a binary Patricia tree.
Stefan Edelkamp, "Patricia tree", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed., U.S. National Institute of Standards and Technology.
www.nist.gov /dads/HTML/patriciatree.html   (161 words)

  
 trie - OneLook Dictionary Search
Tip: Click on the first link on a line below to go directly to a page where "trie" is defined.
trie : Dictionary of Algorithms and Data Structures [home, info]
Phrases that include trie: compact trie, elastic-bucket trie, elastic bucket trie, hash trie, patricia trie, more...
www.onelook.com /cgi-bin/cgiwrap/bware/dofind.cgi?word=trie   (107 words)

  
 perl-Net-Patricia RPM : Dries RPM Repository
Summary: Patricia Trie perl module for fast IP address lookups
Red Hat Enterprise Linux 4 for x86_64 (el4-x86_64)
Red Hat Enterprise Linux 3 for i386 (el3-i386)
dries.studentenweb.org /apt/packages/perl-Net-Patricia/info.html   (144 words)

  
 Misc Resources   (Site not responding. Last check: 2007-10-12)
It also supports more advanced string queries (partial-match search).
A TST can be seen as a hybrid between a binary search tree and a digital search trie.
Since version 0.20, the package also comes with an implementation of the Aho-Corasick string searching algorithm in which TST's play the part of the keyword dictionary/automaton.
kolchak.sdf-eu.org /miscres.html   (386 words)

  
 [No title]   (Site not responding. Last check: 2007-10-12)
(2)¡ Ÿ ¾PATRICIA trie compressed trie  nodes with only one child are removed indexes large number of strings in a compact and efficient structure instead of storing entire key, indexes differences between keys; hence, slow growth ¡(ÒÒª,  Ãó Ÿ "Index Fabric"!
(3)¡ Ÿ¨¯PATRICIA trie nodes labeled with depth - the character position in the key represented by the path size of trie is independent of key lengths agressive (but lossy) compression¡6¢¡ªP ^ ó($Ÿ "Index Fabric"!
(5)¡ Ÿ¨WSolution: Divide the trie into block-sized sub-tries Index sub-tries with a second trie¡2 N Mª,:óŸ "Index Fabric"!
www.cs.ucr.edu /~tsotras/cs267/IndexFabric.ppt   (753 words)

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