You control this secondary property file. Its contents overrides the property characteristics as defined in the SAPROPS.CFG file. You can make extensive modifications to the System Architect meta-file through USRPROPS. You can even add up to 50 definitions that we have never heard of, and set up intricate relationships among them, and among them and the definitions that are included in SAPROPS.
So you can create a “master” USRPROPS.TXT, with all the properties and relationships between definitions that you want everybody in your company to use on every project. Keep that file in the subdirectory with the executable.