The definitions regarding constraints in the Information Model - http://w3c.github.io/poe/model/#infoModel - sections about Permission, Prohibition and Duty are currently not very clear and precise.
This should be improved, see proposals in https://www.w3.org/2016/poe/wiki/Constraints_in_the_Information_Model
The definitions regarding constraints in the Information Model - http://w3c.github.io/poe/model/#infoModel - sections about Permission, Prohibition and Duty are currently not very clear and precise.
This should be improved, see proposals in https://www.w3.org/2016/poe/wiki/Constraints_in_the_Information_Model