After weeks of work, the reference site for the EM is on-line.
Extended Matrix is
.. a formal language with which to keep track of virtual reconstruction processes. It is intended to be used by archaeologists and heritage specialists to document in a robust way their scientific activities. It organises 3D archaeological record so that the 3D modelling steps are smoother, transparent and scientifically complete. It has been developed by E. Demetrescu at CNR-ITABC (Rome).
The site provides resources, news, exercises, video tutorial and quick reference sheets.