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Paper Abstract and Keywords
Presentation 2004-10-19 14:00
Schema update operations preserving the expressive power in XML databases
Kenji Hashimoto, Yasunori Ishihara, Toru Fujiwara (Osaka Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes schema update operations preserving the expressive power in XML databases. In this paper, the information conveyed by an XML document is considered as the ancestor-descendant relation and the relative ``document order'' between the elements in the document. XML documents and schemas are modeled as labeled ordered trees and regular tree grammars, respectively. Then, embeddability between tree languages is defined. Under the definition, a schema $G_1$ has more expressive power than $G_2$ if the tree language generated by $G_2$ is embeddable in that generated by $G_1$. Then, two update operations on schemas are introduced. It is shown that the operations are sound with respect to preservation of the expressive power. Moreover, it is shown that the operations are also complete for local tree grammars, which correspond to DTDs.
Keyword (in Japanese) (See Japanese page) 
(in English) regular tree grammar / embeddability / schema update operation / XML / / / /  
Reference Info. IEICE Tech. Rep., vol. 104, no. 345, DE2004-118, pp. 25-30, Oct. 2004.
Paper # DE2004-118 
Date of Issue 2004-10-12 (DE, DC) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee DE DC  
Conference Date 2004-10-18 - 2004-10-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Data Enginieering, Dependability, etc. 
Paper Information
Registration To DE 
Conference Code 2004-10-DE-DC 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Schema update operations preserving the expressive power in XML databases 
Sub Title (in English)  
Keyword(1) regular tree grammar  
Keyword(2) embeddability  
Keyword(3) schema update operation  
Keyword(4) XML  
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1st Author's Name Kenji Hashimoto  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Yasunori Ishihara  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Toru Fujiwara  
3rd Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2004-10-19 14:00:00 
Presentation Time 30 minutes 
Registration for DE 
Paper # DE2004-118, DC2004-33 
Volume (vol) vol.104 
Number (no) no.345(DE), no.347(DC) 
Page pp.25-30 
#Pages
Date of Issue 2004-10-12 (DE, DC) 


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