Dear all, I have been working on a proposal for a useful utility for managing non hierarchal, bi-directional relationships between objects and as a useful tool in object composition. This utility is in the form of a type of templated smart pointer that can connect to one single other pointer and manage the relationship between the two pointers. This paired_ptr object is intended for use as a member of (or at least contained within) a user defined object and is conceptualized from the needs of object composition. Prototype source code, a usage example and brief documentation is available here: http://www.boostpro.com/vault/index.php?action=downloadfile&filename=paired_ptr.zip&directory=& Doumentation only is available here: (this is a google doc and is continually being updated) http://docs.google.com/View?id=dc33pnfx_442s22z7d6 I am posting here in the hope it will generate suitable interest that it may be worth developing as a full library for submission. Best wishes, Dan