  principles that should govern autonomous AI systems. It essentially states
that a system's goals and behaviour should be aligned with human values. But
how to ensure value alignment? In this paper we first provide a formal model to
represent values through preferences and ways to compute value aggregations;
i.e. preferences with respect to a group of agents and/or preferences with
respect to sets of values. Value alignment is then defined, and computed, for a
given norm with respect to a given value through the increase/decrease that it
results in the preferences of future states of the world. We focus on norms as
it is norms that govern behaviour, and as such, the alignment of a given system
with a given value will be dictated by the norms the system follows.
