Exactly; "fancy" is relative. It's a bit tricky, but it's nothing like the complexity of maintaining and using a keyword index. The reference implementation giv

Exactly; "fancy" is relative. It's a bit tricky, but it's nothing like the complexity of maintaining and using a keyword index. The reference implementation given in the article we linked to is thirty-odd lines of code. What we're using in practice is somewhat larger, in part because Java is more verbose for this kind of thing, but still reasonable. (If there's interest, we'd be happy to post the code.)