Parameter descriptions, and parameter setting algorithm
The most recent description of the parameter setting algorithm is in Crisma et al. (2020). The text of the paper can be downloaded here.
The appendix, that contains a list of short descriptions and manifestations of the 94 parameters used in that work, can be downloaded here: Part 1; Part 2.
A short description of the parameters in the dataset(s) used for previous publications/implementations of the PCM can be found here, as the electronic appendix of Longobardi et al (2013)