05278979 is referenced by 269 patents and cites 5 patents.

A single entity contains source lines, being operated on by one or more end users. Within the same entity are entity version and level control data. Individual source lines contain version-related identification variables. After each version or level update by a user, a comparison is made between new and old versions; source line identification variables are modified, and new source lines are added; dependent version information is stored in the entity, and control data is updated. Subsequent retrievals of a version are responsive to the dependent version information, and produce indications of any changes that had been made to dependent versions.

Title
Version management system using pointers shared by a plurality of versions for indicating active lines of a version
Application Number
7/630928
Publication Number
5278979
Application Date
November 20, 1990
Publication Date
January 11, 1994
Inventor
Ellory K McCaulley
Boulder
CO, US
Richard D Foster
Poughkeepsie
NY, US
Agent
William B Porter
Assignee
International Business Machines
NY, US
IPC
G06F 7/06
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