I agree. Functors would apply some transformation to a node, not a query/selection. Still, important and interesting ideas here. Could we perhaps create JIRA tasks for these (so they don't get lost) and target them for, say, 2.3.0 for now? The 3 items here would be: 1) OrderedNode 2) Functors 3) Cache querying And create wiki pages to make a note of ideas, etc. and link to these pages from the JIRA tasks? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3991004#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...