Interface online/direct with external system PLM

Hello everyone,

we are evaluating the possibility to interface Navision with external packages.
We have already done some developments already in production phase for some customer using text file and reading of them via NAV Report scheduled by NAS.

We are studying if it is possible to interface it with a PLM system but we want to have an online/immediate/direct update without text file.
I know that it is not a good idea to write directly in Navision table without validations, Navision object but I ask you suggestion and the best way to have this behavior.

Thank you

Andrea