This session will bring up (again) some of the issues from this paper
http://cs.unibo.it/save-sd/2017/papers/html/philipson-savesd2017.html (slides at
https://doi.org/10.5281/zenodo.556984), that is, making PIDs more Findable and Accessible by means of e.g. distributed custodianship, Interoperable and Re-usable by assuring that they are also more *validatable* (e.g. through fixed string-lengths, restricted character sets, with embedded 'semantics'). Global uniqueness could be achieved without having unduly long strings through a modular design, in which different bits and pieces of the string have dedicated semantic content.
