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

Re: actions related to collections

From: Paul Groth <p.t.groth@vu.nl>
Date: Fri, 20 Apr 2012 14:37:50 +0200
Message-ID: <CAJCyKRoUhUq1ZRyw1ymS4E25TvtXixagYXxp9TEo24VRQVjxDg@mail.gmail.com>
To: Paolo Missier <Paolo.Missier@ncl.ac.uk>
Cc: Timothy Lebo <lebot@rpi.edu>, "public-prov-wg@w3.org" <public-prov-wg@w3.org>
Just a note:

I think prov:Collection as a generic type would be nice as it could be
used in many applications in however they see fit.


On Fri, Apr 20, 2012 at 2:32 PM, Paolo Missier <Paolo.Missier@ncl.ac.uk> wrote:
> Tim
> scroll down...
> On 4/19/12 1:41 PM, Timothy Lebo wrote:
>> Paolo,
>>> One possibility is to have a Set type for 1 and 2 (I see no point having a specific type for 1), and Dictionary for 3. This is
>>> done using prov:type.
>>> But then again, why not just have Dictionary. It minimizes the number of definitions. If all I need is a set (2), I can just have
>>> pairs (e,e) as members
>> Because it's a bit verbose for a simple case, and the transition from URI to a literal in PROV-O (and casting back and forth) will
>> be a headache.
>> Although dictionaries _can_ be used for 2 and 1, it's too much effort.
>> I suggest we keep dictionaries to do dictionary things and stop trying to contort it into its simple cases.
>> That leaves:
>> A) We add support for Sets in a direct way
>> B) We just don't' support Sets in a direct way.
> I am in favour of (A), called either:
>    prov:multiset (because they contain entities which may be the same although their id are different)
> or
>    prov:set (if we go by string equality of the entity id)
>> In either case, we can have prov:Collection (stripped of all of it's current meaning) as a superclass of prov:Dictionary (renamed
>> from prov:Collections) and leave it to someone else to extend prov:Collection to make a simple, boring, their:Set.
> yes, prov:Dictionary extends prov:(multi)set
> -Paolo
Received on Friday, 20 April 2012 12:38:20 UTC

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