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Re: PROV-ISSUE-30 (name-for-bob): What name do we use for the BOB construct? [Conceptual Model]

From: Stephan Zednik <zednis@rpi.edu>
Date: Sun, 24 Jul 2011 13:57:03 -0600
Message-Id: <AB71C78F-DE06-4BCE-8F80-7F86D10779B6@rpi.edu>
Cc: "public-prov-wg@w3.org" <public-prov-wg@w3.org>
To: "reza.bfar@oracle.com" <reza.bfar@oracle.com>
I am not partial to snapshot, partially because of the extensive functional usage of the term.  I have always associated a snapshot with a point in time, not a duration - but this may be an incorrect association.

I am open to discussing it, but my initial inclination was negative towards it.

Will we use the same definition as we have been using for BOB?

--Stephan

On Jul 24, 2011, at 9:52 AM, "Reza B'Far" <reza.bfar@oracle.com> wrote:

> I second the term "Snapshot".  This term also has functional usage in several commercial application categories used within roughly the same meaning.
> 
> On 7/24/11 3:45 AM, Khalid Belhajjame wrote:
>> 
>> Hi Stephan,
>> 
>> Given the example you gave in your previous email, I think that "EntitySpanshot" or "Snapshot" should be fine, given that it reflect the fact that it is a description of an entity that holds for some period of time.
>> 
>> Do you agree?
>> 
>> khalid
>> 
>> On 23/07/2011 20:24, Stephan Zednik wrote:
>>> I do not feel that EntityInstance, EntityInstantiation, or InstantiatedEntity make sense for the book ownership scenario, or any scenario modeling the provenance of changes in characteristics of a physical object.
>>> 
>>> To reiterate the example since I haven't committed it to a wiki page yet.  Book X is an entity that represents a real world object.  It can be put on a shelf, loaned to friends, damaged, and/or destroyed.  It has important characteristics (condition, ownership, location, etc) that may change over the life of the book.  We may want to represent the provenance of the book as a chain of ownership.
>>> 
>>> |<----------------------------------------------------- Book X ----------------------------------------------------------------->|
>>> |<!------ Book X with owner A ---->|<----Book X with owner B ---->|<---- Book X with owner A --------->|
>>> 
>>> If a book changes ownership, is the "book with changed ownership" a different EntityInstance?  A different InstantiatedEntity?  I don't think what we current call a BOB is an 'instance of' anything.  I think of it as a description of an entity that holds for some time period (not necessarily given) for which contextually important mutable characteristics of the the entity are held to be known.
>>> 
>>> --Stephan
>>> 
>>> On 7/22/2011 5:29 AM, Curt Tilmes wrote:
>>>> On 07/22/2011 03:43 AM, Khalid Belhajjame wrote:
>>>>> The term "Snapshot" was suggested some time ago, and it seems that
>>>>> several people did like it.
>>>>> We can also use the term "EntitySnapshot".
>>>> 
>>>> Following from snapshot:
>>>> 
>>>> EntityInstance
>>>> EntityInstantiation
>>>> InstantiatedEntity
>>>> 
>>>> Curt
>>>> 
>>>> 
>>>> 
>>> 
>>> 
>>> 
>> 
>> 
> 
> 
Received on Sunday, 24 July 2011 19:58:31 GMT

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