  We develop the general relativity of extended spacetime-property for
describing events including their properties. The anticommuting nature of
property coordinates, augmenting space-time $({\bf x},t)$, allows for the
natural emergence of generations and for the simple incorporation of gauge
fields in the spacetime-property sector. With one electric property this
results in a geometrical unification of gravity and electromagnetism, leading
to a Maxwell-Einstein Lagrangian plus a cosmological term. Addition of one
neutrinic and three chromic properties should lead to unification of gravity
with electroweak and strong interactions.
