- From: Paolo Missier <Paolo.Missier@ncl.ac.uk>
- Date: Mon, 25 Jul 2011 11:48:07 +0100
- To: public-prov-wg@w3.org
Hi, briefly: I have been a fan of "snapshot" myself pre-F2F and still am, I think it just needs tweaking on the temporal interpretation, to go from a point in time to a duration, as Stephan points out. Did someone suggest "spanshot" by mistake or was it intentional. I quite like it (maybe just as a better placeholder than Bob?) -Paolo On 7/24/11 11:43 PM, Reza B'Far wrote: > First, for the record Khalid was the person suggesting Snapshot :) > > The way I've seen snapshot used commercially, it's fairly consistent with the > current definition of BOB. There is some murkiness on both sides (how > "snapshot" is used commercially and I think we're still iterating here on the > definition of BOB, but may be that's close to be finalized). However, I think > they are close enough. What I liked about "Snapshot" is that its intuitive and > is used in several domains that I know of (content management, legal, > configuration systems, and I've also seen use-cases in microfilm production by > old-school librarians). Also, I think "Snapshot" offers a huge advantage that > it's neither explicitly linked to the entity nor its state. And I know the > distinction between entity vs. entity's state and how that's articulated has > been in a lot of the discussions. Using "Snapshot" sort of obsoletes that > discussion. > > On 7/24/11 12:57 PM, Stephan Zednik wrote: >> 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 >>>>>> >>>>>> >>>>>> >>>>> -- ----------- ~oo~ -------------- Paolo Missier - Paolo.Missier@newcastle.ac.uk, pmissier@acm.org School of Computing Science, Newcastle University, UK http://www.cs.ncl.ac.uk/people/Paolo.Missier
Received on Monday, 25 July 2011 10:48:31 UTC