I'm fairly positive that some industious programmer could write a program to automatically create meta-data for each item.  For instance, look at PzDB from Rocketship Software.  It creates a DB that you can search for items, and it will bring up all related items.  That is of course if it indexed it correctly.  Say you search for V4, it will bring up Victoria 4, clothes, poses, characters, etc.  It does have other items that don't relate so it isn't perfect; but it does do a pretty good job.

Keep in mind I am only using PzDB as an example that something along these lines might be possible.