On: What domain of knowledge does my problem fall under?

I am not convinced that just fulltext search would work. Wouldn't fulltext search fail in the case of goat. You have goats milk, goats milk cheese, goat meat. So if someone searched goat all three types would be returned?

Well, if someone claims to have a goat, they probably have all three of those, or can at least make them. ;-)

not if it's a boy goat