Ability to view an objects index of it's position in a list.

General improvements are being made to the management model for more fine grained manipulation of complex attributes, amongst these changes will be the ability to insert items at a specific position in a list.

This feature request is to ask for the ability to see an items index to identify it's position.

i.e. an end user can call :read-recource and see an items position without needing to count how many items there are in order to identify the position of the next insert.