This is just PDM.I built a system that does all of this, more, and integrates into our company&#x27;s existing products for managing manufacturing data. While my version only watches the directories you tell it to, it also detects file movement and changes via a service and through the hashing of files. I&#x27;d be more impressed if someone built this into a file system directly. Combine advanced tag based indexing with zfs and you&#x27;ve got something impressive.