Re: PROV-ISSUE-245 (TLebo): entity was used -> __started__ to be used

On Mar 23, 2012, at 9:53 AM, Luc Moreau wrote:

> Hi Tim and Khalid,
> 
> Tim's suggestion was implemented [1].

Thanks. The interval is much more obvious.

> 
> Regarding Khalid's suggestion, it is intentionally that we are not more specific
> about usage.
> 
> DM4's section 2 says:
> Usage examples include a procedure beginning to consume an argument, a service starting to read a value on a port, a program beginning to read a configuration file, or the point at which an ingredient, such as eggs, is being added in a baking activity. Usage may entirely consume an entity (e.g. eggs are no longer available after being added to the mix); alternatively, a same entity may be used multiple times, possibly by different activities (e.g. a file on a file system can be read indefinitely).
> 
> 
> Given this, we propose to close this issue, pending review.

+1

-tim


> 
> [1] http://dvcs.w3.org/hg/prov/raw-file/default/model/prov-dm.html#usage.time
> 
> Regards,
> Luc
> 
> On 02/07/2012 05:11 PM, Khalid Belhajjame wrote:
>> 
>> On 06/02/2012 22:06, Provenance Working Group Issue Tracker wrote: 
>>> PROV-ISSUE-245 (TLebo): entity was used ->  __started__ to be used 
>>> 
>>> http://www.w3.org/2011/prov/track/issues/245 
>>> 
>>> Raised by: Timothy Lebo 
>>> On product: 
>>> 
>>> I propose to rephrase: 
>>> 
>>>      time: an optional "usage time" t, the time at which the entity was used; 
>>> 
>>> to: 
>>> 
>>>      time: an optional "usage time" t, the time at which the entity started to be used; 
>> 
>> I agree we need to change teh definitition of usage time, but I am not sure the rephrasing you suggest is clearer. What does the "the time at which the entity started to be used" refers to? Perhaps, we can use instead something like 
>> 
>>  time: an optional "usage time" t, the time at which the entity was accessed by the activity; 
>> 
>> Or something in these lines. 
>> 
>> Thanks, khalid 
>> 
>> 
>> 
>>> 
>>> Thanks, 
>>> Tim 
>>> 
>>> 
>>> quote: 
>>> 
>>> A usage record, written used(id,a,e,t,attrs) in PROV-ASN, has the following constituent: 
>>> 
>>>      id: an optional identifier id identifying the usage record; 
>>>      activity: an identifier a for an activity record, which represents the consuming activity; 
>>>      entity: an identifier e for an entity record, which represents the entity that is consumed; 
>>>      time: an optional "usage time" t, the time at which the entity was used; 
>>> 
>>> 
>>> 
>>> 
>> 
>> 
> 
> -- 
> Professor Luc Moreau               
> Electronics and Computer Science   tel:   +44 23 8059 4487         
> University of Southampton          fax:   +44 23 8059 2865         
> Southampton SO17 1BJ               email: l.moreau@ecs.soton.ac.uk  
> United Kingdom                     http://www.ecs.soton.ac.uk/~lavm