Indexing XML Documents Using Tree Paths Automaton
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21240%2F17%3A00314286" target="_blank" >RIV/68407700:21240/17:00314286 - isvavai.cz</a>
Result on the web
<a href="http://drops.dagstuhl.de/opus/frontdoor.php?source_opus=7945" target="_blank" >http://drops.dagstuhl.de/opus/frontdoor.php?source_opus=7945</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4230/OASIcs.SLATE.2017.10" target="_blank" >10.4230/OASIcs.SLATE.2017.10</a>
Alternative languages
Result language
angličtina
Original language name
Indexing XML Documents Using Tree Paths Automaton
Original language description
An XML document can be viewed as a tree in a natural way. Processing tree data structures usually requires a pushdown automaton as a model of computation. Therefore, it is interesting that a finite automaton can be used to solve the XML index problem. In this paper, we attempt to support a significant fragment of XPath queries which may use any combination of child (i.e., /) and descendant-or-self (i.e., //) axis. A systematic approach to the construction of such XML index, which is a finite automaton called Tree Paths Automaton, is presented. Given an XML tree model T, the tree is first of all preprocessed by means of its linear fragments called string paths. Since only path queries are considered, the branching structure of the XML tree model can be omitted. For individual string paths, smaller Tree Paths Automata are built, and they are afterwards combined to form the index. The searching phase uses the index, reads an input query Q of size m, and computes the list of positions of all occurrences of Q in the tree T. The searching is performed in time O(m) and does not depend on the size of the XML document. Although the number of queries is clearly exponential in the number of nodes of the XML tree model, the size of the index seems to be, according to our experimental results, usually only about 2.5 times larger than the size of the original document.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
6th Symposium on Languages, Applications and Technologies
ISBN
978-3-95977-056-9
ISSN
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e-ISSN
1868-8969
Number of pages
14
Pages from-to
"10:1"-"10:14"
Publisher name
Dagstuhl Publishing,
Place of publication
Saarbrücken
Event location
Vila do Conde
Event date
Jun 26, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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