[Odrl-version2] Core Model: Roles, Parties and Assets

[ri at odrl.net]

On 6 Nov 2010, at 02:54, Francis Cave wrote:

> 1. The new Role entity appears to be optional, although neither Figure 2.1 nor the text of 2.4 is clear on this point. What is the intention here? The dotted lines in Figure 2.1 suggest that the precise relationship of the new Role entity with the existing entities is not yet settled – or is this a UML convention with which we are not familiar?

The dashed lines means that Role is an "Association Class" in UML speak [1].

So, the cardinality depends on the two classes each end of the association (eg Permission/Party)

Cheers

Renato Iannella
ODRL Initiative
http://odrl.net

[1] http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/  (see section "Association class")
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