How to implement a Definitive Media Library (ITIL DML) ?

I would like to know some way to implement a DML based on ITIL.

Given a library of heterogeneous software the only solution that crosses my mind is to use a system file structure (with proper security and access permissions), however this seems very simple and if the library gets too big it will be hard to find software that search.

Is there any specific software for DML?