[Odrl-version2] Core Model: relationship between Action and Duty

[ri at odrl.net]

On 9 Nov 2010, at 00:37, Francis Cave wrote:

> I'm trying to interpret the cardinalities ('1' and '1') at both ends of the associations between the Action entity and each of the Permission, Prohibition and Duty entities in Figure 2.1. I may simply be showing my ignorance of how to interpret UML diagrams. :o) I understand the '1' at the Action end of each association, but I don't understand the '1' at the other end in each case.


This means there is a "1 to 1" association between these entities.

ie: A Permission can have one Action. An Action can have One Permission.

(but, of course, you can have many Permissions per Policy)

Cheers

Renato Iannella
ODRL Initiative
http://odrl.net