  An insight into vortex reconnections in superfluids is presented making use
of analytical results and numerical simulations of the Gross--Pitaevskii model.
Universal aspects of the reconnection process are investigated by considering
different initial vortex configurations and making use of a recently developed
tracking algorithm to reconstruct the vortex filaments. We show that during a
reconnection event the vortex lines approach and separate always accordingly to
the time scaling $ \delta \sim t^{1/2} $ with pre-factors that depend on the
vortex configuration. We also investigate the behavior of curvature and torsion
close to the reconnection point, demonstrating analytically that the curvature
can exhibit a self-similar behavior that might be broken by the development of
shock-like structures in the torsion.
