Efficient query execution techniques in a 4DIS video database system for eLearning

C.-W. Fung, E.W.-C. Leung, Qing Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


In this paper, we describe our work on developing an eLearning video database system. The eLearning video database provides a temporal modeling framework for describing eLearning video data and it supports data distribution by applying vertical class partitioning techniques. Building on top of our previous work on Four Dimensional Information System (4DIS) - an object-oriented temporal modeling framework, we apply vertical class partitioning techniques onto a 4DIS eLearning video database system as a means for efficient query execution. We further describe our work on dynamic fetching of multimedia eLearning video on the Internet. A detailed cost model for query execution through vertical class partitioning is developed. Finally, we demonstrate through the use of a running example the effectiveness of our vertical class partitioning approach.
Original languageEnglish
Pages (from-to)25-49
Number of pages25
JournalMultimedia Tools and Applications
Issue number1
Publication statusPublished - 1 May 2003
Externally publishedYes


  • Four-dimensional information space (4DIS)
  • Multimedia eLearning video database system
  • Temporal semantics
  • Vertical class partitioning

ASJC Scopus subject areas

  • Software
  • Media Technology
  • Hardware and Architecture
  • Computer Networks and Communications


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