Temporal versioning of XML documents

Authors:
Vilas Wuwongse;Masatoshi Yoshikawa;Toshiyuki Amagasa
Affiliations:
Computer Science and Information Management Program, Asian Institute of Technology, Klong Luang, Pathumthani, Thailand;Information Technology Center, Nagoya University, Nagoya, Japan;Graduate School of Information Science, Nara Institute of Science and Technology, Nara, Japan
Venue:
ICADL'04 Proceedings of the 7th international Conference on Digital Libraries: international collaboration and cross-fertilization
Year:
2004

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Abstract

A data model supporting the unification of the management of temporal XML document databases and version control, i.e., a Temporal Version Data Model (TVDM), is proposed. TVDM is temporally change-centric and represents the change between two consecutive versions by means of temporal delta (tDelta). A tDelta employs a temporal XML expression (tXex) which is an extension of ordinary XML elements by incorporation into them temporal as well as ordinary variables. In addition to valid time, TVDM introduces version time and associates it with each version. All versions including the base or the current one can be uniformly represented by tDeltas. A technique to implement TVDM is also presented.