Deltas and Versions

When you check in a file, SCCS records only the line-by-line differences between the text you check in and the previous version of the file. This set of differences is known as a delta. The file version that you initially checked out was constructed from a set of accumulated deltas. The terms delta and version are often used synonymously; however, their meanings are not the same. It is possible to retrieve a version that omits selected deltas.