==Computational gestalts==
There are number of commonly accepted concepts that are redefined  or reevaluated in xreate. 

* Interface is comprised of common subset of features supported by all concrete implementations.
    See [[concepts/containers]]

* Entity's annotations(like function, objects annotations) are exposed to and could be intospected by client code in other words by caller. 
 Most usefull is exposing of caller annotations to a callee code.
 
 *Lazy/eager execution opposition. 
  It's possible to determine which sites of using resource should treat it as lazy resource or eager otherwise. 
  See [[concepts/usage]] for details.