880: I know you and Manik don't believe me, but this is a fundamental feature that most cache services provide as part of their basic API, i.e. put(k, v, ttl). The dev discussion explains this motivation in detail. I already gave about 3 examples (HTTP cache, session cache, geospatial cache), are these not compelling examples? 841: I don't see how you can implement efficient queries (that is better than O(N)) without some sort of indexing, or in this case per-node sorting. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3990712#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...