Definition: An additional gravitational dictionary

A proposed bulk interpretation additionally specifies:

1. a named Lorentzian spacetime or gravitational configuration class, with its causal and boundary data;

2. bulk observables and their domains;

3. maps relating those observables to the declared boundary or interval observables;

4. the states, preparations, and access roles being compared;

5. agreement, locality, dynamics, and approximation theorems on those same identified objects;

6. for an island or entropy prescription, the required entropy terms, geometric functional, admissibility conditions, and extremization problem.

None of these clauses is supplied merely by naming an extension algebra or its Q-system.