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Delta technique and string-to-string correction

  • Wolfgang Obst
II — Configuration Management
Part of the Lecture Notes in Computer Science book series (LNCS, volume 289)

Abstract

Delta technique is used to store versions of programs or other data economically in revision control systems. In recent revision control systems deltas are computed by compare programs, using lines as atomic symbols. In this paper a method is presented which, in contrast, uses characters as atomic symbols. The deltas are about 30 percent smaller than deltas generated by diff (the standard comparison tool on UNIX for generating deltas); the performance is similar to diff.

Furthermore, this method can be used to store versions of byte-oriented files (e.g. graphical metafiles) economically.

Fields

Software version and configuration control 

Key words

delta technique revision control systems source control 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • Wolfgang Obst
    • 1
  1. 1.Institut für angewandte InformatikTechnische Universität BerlinBerlin 10

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