A software program written or integrated by a CDS developer to perform a specific set of functions on a CDS. Examples include protocol adapters (e.g. Secure File Transfer Protocol daemon (SFTPd), Hypertext Transfer Protocol daemon (HTTPd)), filters, a filter orchestration engine (FOE), the CALD/CJD, and system or CDS administrative interfaces built specifically for the CDS.
Sources:
CNSSI 4009-2022