DID Modules are used in the ITP DID Language in the ITP/SDK MultiPlatform. Within a DID the Entries and Functions are defined in the DID Module. On the DID level you only specify which Main Entries and Functions are available to a Model Developer. A DID has one or more DID Modules. The DID Modules only have a meaning for the DID Developer. The Model Developer does not know anything about DID Modules and does not see a difference between Entries that are defined in different DID Modules.
For each DID Module you have to specify a Connection Type. You can use DID Modules for different Connection Types in a single DID. You can link Entries together from different DID Modules through the Import-Export mechanism. You can create DID Modules for different ITP Connection types and combine these DID Modules in a DID. This way you can create true MultiPlatform DIDs. This feature is only supported by the ITP/SDK MultiPlatform.