I manage photos using exif tags and digiKam. I have looked unsuccessfully for a similar facility for managing other types of files. I am aware of document management software like Sharepoint (I know it is from MS and it is evil, but it is just an illustration) and others, but such things are more complex than I would like.
I see that Caja appears to support searching based on tags, but I have not found how to add tags to a .txt file (for example) in a way that Caja “sees.” I have tried “notes” and “extended attributes” in file properties.
In lieu of using metadata embedded in files, an application that uses a database similar to digiKam would be fine.
Probably this is a complicated issue because of all of the different file types, but I thought that I’d see if anyone can suggest an existing tool that would come close.
Thanks for considering this.