W3C home > Mailing lists > Public > public-prov-wg@w3.org > May 2012

Re: Difference between wasInformedBy and wasStartedByActivity

From: Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
Date: Thu, 3 May 2012 14:13:44 +0100
Message-ID: <CAPRnXtkW_PDySHDEdYCt9cEoPKOxJ3O-JzenmNq0bhGOkwbY_g@mail.gmail.com>
To: Jun Zhao <jun.zhao@zoo.ox.ac.uk>
Cc: public-prov-wg@w3.org
Yes, those are the interpretations from
https://dvcs.w3.org/hg/prov/raw-file/default/model/prov-constraints.html#component-1--entities-and-activities

On Thu, May 3, 2012 at 12:42 PM, Jun Zhao <jun.zhao@zoo.ox.ac.uk> wrote:
>
> Stian,
>
>>> I am confused. Are you talking about wasStartedByActivity or
>>> wasInformedBy?
>>> I guess you are talking about wasStartedByActivity. And I think this is
>>> precisely why Tim is also pushing to keep only one of them in the DM.
>
>
> Good try!
>
>>
>> A wasInformedBy B says that B used X, wasGeneratedBy A. If we also
>> know entity X and how it was used and generated, wasInformedBy is just
>> restating that.
>
>
> Do you mean to say that
>
> A wasInformedBy B -->
>
> there is an X that wasGeneratedBy B, and used by A
>
>>
>> A wasStartedByActivity B says that B wasStartedBy X, which
>> wasGeneratedBy A. If we also know that entity X and how it started A
>> and was generated by B, then wasStartedByActivity is just restating
>> that.
>
>
> A wasStartedByActivity B ->
>
> A wasStartedBy X, which wasGeneratedBy B
>
> Although my understanding is that wasStartedByActivity was not meant as a
> shortcut, but for cases where X is truly unknown, for expressing
> control-flow relationship between activities. This is the 'hidden trigger'
> case that Tim said that he might have missed.
>
>
> cheers,
>
> Jun
>
>>
>>
>> So both are shortcuts, and should have value as such where we don't
>> know much about X, or where we add more data to that indirect
>> relationship.
>>
>>
>



-- 
Stian Soiland-Reyes, myGrid team
School of Computer Science
The University of Manchester
Received on Thursday, 3 May 2012 13:14:37 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Thursday, 3 May 2012 13:14:38 GMT