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Temporal Data Management Based on XML(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2008年04期
Page:
82-86
Research Field:
Publishing date:

Info

Title:
Temporal Data Management Based on XML
Author(s):
Jiang Xiajun; Pi Dechang
College of Information Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
Keywords:
XML;  tem po ra l data;  da tam ode l
PACS:
TP311.13
DOI:
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Abstract:
The effic iency of som e query operations can bene fit from temporally grouped data models greatly. And the sem -i structural cha racter istic of XML docum ent is we ll su ited for such m ode ls of tempora l database. W ithout cons idering the query optim ization o f index techno logy, the length of tem po ra l data docum ent is one o f the key factors for the query operations. Tw om ethods o f tim e representa tion for tempora lXML database-attribution tim e- stamped m ode l and elem ent tim e- stamped m ode l are researched firstly in th is pape r. Then a new m ethod, tex t prefix tim e-stamped mode,l is presented. Based on the three temporal XML data m odels, the elim ina tion of tim e info rm ation redundancy is also studied by m ak ing use o f tim e in terva l re lationship among e lem en ts of the tem poral XM L do cum ents. Exper im ents show tha t a fter elim ina ting o f tim e in fo rm ation redundancy, the leng th o f documents is rap idly dropped

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Last Update: 2013-04-24