Abstract
Version control keywords are another release-related feature providing a mechanism for finding version information about a released working file (see section on working file). When files under version control are released, it can become necessary to know the version of a released file. This is common in scenarios where software bugs, problems, questions or even a suggestion relative are made relative to source code file of a software release. Without keywords, there is a great amount of difficulty finding which version of a released file. The alternative without version control is comparisons with every past version of the file. Fortunately, version control systems provide keywords which can be placed in files and updated automatically by version control.
Keyword in RCS are unique strings which are substituted with values related to the file's revision, including revision number, revision date and author. In RCS, keywords are inserted into working files as recognized terms between two dollar-symbols ($). Some of these recognized terms are the strings Revision, Author, Date, Log and Id.