I think the future "may" be the JCR Standard (Java Content Repository), or at least something build 'on top of' JCR. The only real contender IMO is Apache Jackr

I think the future "may" be the JCR Standard (Java Content Repository), or at least something build 'on top of' JCR. The only real contender IMO is Apache Jackrabbit Oak. In general what this article describes is a Content Repository, but a real world-wide semantic web has not yet been built with it. My little project meta64.com is a mobile front end for some of this kind of data processing/storage.