System definition files and map source files
The following table notes the parallels between a system definition file (.msd) and a map source file (.mms).
| system definition file (.msd)... | map source file (.mms)... |
|---|---|
| Normally
contains one or more executable systems. Because a system contains a collection of maps, you can view a system definition file as a level up from a map source file |
Normally contains one or more executable maps. |
| Maintains
systems in source format for design purposes. Systems are not executed directly from a system definition file. You analyze and generate process control information for a particular system to execute it |
Maintains
maps in source format. Maps are not executed directly from a map source file. You build a compiled map to execute it |