Actor is a property of the statement, agent or group are values of that property. E.g. age is a property of Andrew. The value of age is a duration of time.

paul-esch <notifications@github.com> wrote:

>In xAPI.md:
>
>> -constituent Agents. Inverse functional identifiers used for identified Groups > -SHOULD NOT be used for any Agents. > - > -Systems consuming Statements MUST NOT assume member Agents comprise an exact > -list of agents in an anonymous or identified Group. > - > -__Anonymous Group__ > -<table> > +``` > + > +####4.1.2.2 Group > +#####Description: > + > +A Group... > + > +* is a type of Actor just like an Agent is; 
>
>This was based on the phrase "Groups are similar to Agents" in the original. Deleted line 484 entirely.
>
>Must say though that 'Actor' seems to be a widely used term. Also, this chapter 4.1.2. itself is called 'Actor'.
>
>Do we need to clarify the relation (if any) between the three concepts / terms?
>
>—
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