Editing the DDI file

The DDI file is an xml file that contains the following object information:

1. Reactions—actions that objects can perform.
2. Events that objects can generate.
3. States of objects.
4. Rules of transferring the object state from one to another at certain events.
5. Names of the bmp files that are used for displaying objects on the map.

The main.ddi file contains the properties of Axxon PSIM's main objects. For your objects, we recommend creating a separate file, main.xxx.ddi, where xxx is a unique part of the filename. By using a separate file, you can avoid the double inclusion of object properties after the Axxon PSIM update. When you start Axxon PSIM, DDI files are merged.

If an object is duplicated in several ddi-files, then when you start Axxon PSIM, the properties of the object from the last file are applied in accordance with the sorting of files by name. For example, if an object is described in the main.xxx.ddi, main.xxx1.ddi, and main.xxx2.ddi files, the properties from the main.xxx2.ddi are applied.