The Set Build Version Action allows you to modify the Build Version during the build.
Value
The build version expression. This field allows you to use Query Syntax in order to set dynamic values in your version string. The result of this expression can be any string to a maximum of 128 characters. By convention, this would be Major.Minor.Build.Revision (for .Net) or Major.Minor.Release.Build (for native apps).
Note that Continua sets the Build Version string when the build is started, using the Version Format String specified in the Configuration Wizard. You should only need to use this Action if you need to apply a Version string that is generated during the build (for example, by reading a value from a file).