This repository contain a new implementation of Nominal Isabelle. Subdirectories: Attic ... old version of the quotient package (is now part of the Isabelle distribution) Literature ... some relevant papers about binders and Core-Haskell Nominal-General . implementation of the abstract nominal theory Nominal ... main files for new Nominal Isabelle Nominal/Ex ... examples for new implementation Paper ... submitted to ICFP Pearl ... paper accepted at ITP