•  Within a context, the link to the shared node should:

-  reveal that the node it points to is shared.
-  reveal all other contexts in which the shared node exists.
-  provide navigation to all other contexts in which the link exists.

•  The shared node itself should:

-  reveal that it is shared.
-  provide navigation to other contexts in which it resides.

•  The technique should work for hierarchies of any depth, or for networks.