role vs. requestedBy or providedBy

Date: 10/01/01

I do not understand the distinction between role and requestedBy or
providedBy.  The Profile specification defines the role property as a
link between the profile and an actor, and then states that the actor
is the entity that provides the services or makes the request.  The
requestedBy and providedBy properties are defined as similar but
distinct from the role.

Is the intent of the role property to allow the requestedBy or
providedBy properties to take on "job context" information, e.g. a
"user" (actor) executing an "administration" function (role).  If so,
wouldn't one subproperty requestedBy or providedBy?

Clarification or examples would be much appreciated.

Thanks -


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