ISBN : 978-81-963532-2-3 (E-Book) and MOD1.3. Then, SCCS and RCS stores the original module MOD1.1 together withchanges needed to transform MOD1.1 into MOD1.2 and MOD1.2 to MOD1.3. The changesneeded to transform each base lined file to the next version are stored and are called deltas. Themain reason behind storing the deltas rather than storing the full version files is to save diskspace.ThechangecontrolfacilitiesprovidedbySCCSandRCSincludetheabilitytoincorporate restrictions on the set of individuals who can create new versions, and facilities forchecking componentsinandout(i.e.reserveandrestoreoperations).Individualdeveloperscheck out components and modify them. After they have made all necessary changes to a moduleand after the changes have been reviewed, they check in the changed module into SCCS or RCS.Revisions are denoted by numbers in ascending order, e.g., 1.1, 1.2, 1.3 etc. It is also possible tocreatevariants or revisions of acomponentbycreatingafork in thedevelopmenthistory. 199 Software Engineering Keerthana P, Manasa KN, Ganga D Bengal
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