[poe] Issue: Cardinality of Permission in Policy marked as Model

riannella has just labeled an issue for https://github.com/w3c/poe as "Model":

== Cardinality of Permission in Policy ==
The Information Model [states that](https://w3c.github.io/poe/model/#permission)

> An ODRL policy expression MAY contain at least one Permission.

Exactly what is the cardinalty here? A **may** means that it's optional, so the above definition would allow me to construct a Policy with no Permission and only Prohibitions and Duties (which wouldn't make much sense since the Assignee cannot really do anything). So I assume that you mean that the Policy **must** contain at least one Permission.

See https://github.com/w3c/poe/issues/144

Received on Saturday, 29 April 2017 13:27:08 UTC