[ALPS-users] Documentation for MPS data structure

Hello and happy new year! I would like to be able to save(load) MPS with the ALPS format so that I can: i) initiate DMRG with custom MPS derived from a different code, or to be able to ii) use the overlap function and compare results of separate code to those of ALPS. The question is whether there is already a standard way implemented for such activities and is it documented? Also, is there a documentation for how the ALPS-MPS is saved in HDF5 format? Amir