  The AFLOW Library of Crystallographic Prototypes has been updated to include
an additional 683 entries, which now reaches 1,783 prototypes. We have also
made some changes to the presentation of the entries, including a more
consistent definition of the AFLOW-prototype label and a better explanation of
our choice of space group when the experimental data is ambiguous. A method is
presented for users to submit new prototypes for the Encyclopedia. We also
include a complete index linking to all the prototypes currently in the
Library.
