Triaged by Diego Ruiz,
I believe this is been addressed by the community with plugins (for instance: https://github.com/Optum/iDempiereAttachmentOpenKM).
you showed us something about DMS in the latest iDempiere conference, but I am not sure if that was meant to be a plugin or integrated into the core. If that is meant to be integrated into the core, please feel free to reopen the ticket.
What I show is done as plugins. So good to close this ticket.