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Re: PROV-ISSUE-329 (jzhao): prov:wasStartedByActivity sub-property of prov:wasInformedBy? [mapping prov-dm <-> prov-o]

From: Timothy Lebo <lebot@rpi.edu>
Date: Fri, 16 Mar 2012 09:07:38 -0400
Cc: Jun Zhao <jun.zhao@zoo.ox.ac.uk>, public-prov-wg@w3.org
Message-Id: <6CE17BE7-D65F-4C2C-AC1F-876809CDC132@rpi.edu>
To: Daniel Garijo <dgarijo@delicias.dia.fi.upm.es>
Daniel, Jun,



On Mar 16, 2012, at 7:50 AM, Daniel Garijo wrote:

> Hi Jun,
> you have an example in DM, but to keep it short:
> If I have a computer program (cp1) that generates a log file (lf1) and starts a web service (ws1), then
> ws1 is not informed by cp1 (it does not consume any of the
> generated outputs by the computer program), but it was started by it. 
> 
> On the other side, if I have a third activity (a3) that uses lf1 generated by cp1,
> then a3 wasInformedBy cp1.
> 
> Is that more clear?

I think it would be helpful to form this example using a bit more PROV-N or PROV-O.

> 
> Best,
> Daniel
> 
> 2012/3/16 Jun Zhao <jun.zhao@zoo.ox.ac.uk>
> Hi Daniel,
> 
> Thanks for the clarification.
> 
> The ProvRDF doesn't provide definitions of these terms, so I looked at them simply from the logic point of view.:)

Jun, when you say ProvRDF, do you mean the OWL file?
"ProvRDF" means the mappings at http://www.w3.org/2011/prov/wiki/ProvRDF
and is different from the OWL file.

> 
> I guess I should go read DM but it might be faster if I can get an answer from you.
> 
> Can you give me an example to show that an activity a1 was started by another activity a2, while a1 was /not/ actually informed by a2?


^^^ This is a perfect phrasing. I agree that to be started by another activity implies that some entity was transferred.


:activity_2
  prov:wasStartedByActivity :activity_1
.

==>

:activity_1
   prov:generated :go
.

:activity_2
  prov:used :go;
  prov:wasStartedByActivity :activity_1;
  prov:wasInformedBy :activity_1;
.


-Tim



> 
> Sorry if I am raising a repeated technical discussion. If you or others could point me to relevant issues to look at, I would most appreciate it. This will help me to decide where this term should belong to in the prov-o spec and whether an additional example is needed.
> 
> cheers,
> 
> Jun
> 
> 
> On 16/03/2012 11:00, Daniel Garijo wrote:
> Hi Jun,
> I don't think this is appropriate: wasInformedBy expresses dependencies
> within activities
> (i.e., p2 generated e1 and p1 used p1), while wasStartedByActivity just
> indicates that p2 started p1.
> 
> In both cases there is a dependency, but I don't think it's enough to make
> one subclass of the other.
> 
> Thanks,
> Daniel
> 
> 2012/3/16 Provenance Working Group Issue Tracker<sysbot+tracker@w3.org>
> 
> PROV-ISSUE-329 (jzhao): prov:wasStartedByActivity sub-property of
> prov:wasInformedBy? [mapping prov-dm<->  prov-o]
> 
> http://www.w3.org/2011/prov/track/issues/329
> 
> Raised by: Jun Zhao
> On product: mapping prov-dm<->  prov-o
> 
> Should prov:wasStartedByActivity be sub-property of prov:wasInformedBy?
> 
> 
> 
> 
> 
> 
> 
> 
Received on Friday, 16 March 2012 13:19:24 GMT

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