[curry] Dynamic Predicates?

Hi! I'm reading the "Dynamic Predicates in Functional Logic Programs" paper and I'm finding it quite interesting since I've always found the integration with persistent data stores to be a weak point in most languages and frameworks, and it seemed to me that Logic Programming should offer a more natural way to deal with this problem given that it's got the idea of a global database built in (as the paper points out). So my question is: has this been implemented in any form in existing Curry systems? I think there was a mention of dynamic predicates having been implemented as a library but I can't find it. Was the idea scrapped perhaps? Cheers /Felix