Anyone created a database to cross reference schematics, articles, etc?

Hi everyone,
I have a huge quantity of pdf magazines and books and want to make searching for something easier.

Has anyone put together a database referencing schematics and articles, and what was the tool and way of doing it?

Am thinking of using libreoffice base, or ms access, or even memento db and creating jpg's of every circuit and linking them each to a db record detailing the magazine or book it came from together with other searchable info.... so that eventually I could search, for instance, for any circuit that is a schmitt trigger using mosfets, or power supply circuit that uses a partucular integrated circuit, etc etc.

This is a huge task, I know. Wonder if anyone went down this route, how they did it, and what the result turned out like.
Thanks