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Re: Prov-o call on Monday 12:00noon US ET

From: Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
Date: Tue, 25 Oct 2011 16:42:44 +0100
Message-ID: <CAPRnXt=5FPE29r8etT0=Y-9Ztw6RAJsuW2KpLpD86kPe2J6YfQ@mail.gmail.com>
To: Paolo Missier <Paolo.Missier@ncl.ac.uk>
Cc: public-prov-wg@w3.org
On Tue, Oct 25, 2011 at 11:41, Paolo Missier <Paolo.Missier@ncl.ac.uk> wrote:


>> Such flat merging would also affect issues in PROV-DM - for instance
>> the current Collection approach would not work in a merged account.
> why not?

Because it has unpacked the n-ary relationship of a "collection entry"
into three different wasDerivedFrom subproperties.

# Account 1

# c1 + (k1,e1) ==> c2
  wasAddedTo_Coll(c2,c1)
  wasAddedTo_Key(c2,k1)
  wasAddedTo_Entity(c2,e1)

# c2 + (k2,e2) ==> c3
  wasAddedTo_Coll(c3,c2)
  wasAddedTo_Key(c3,k2)
  wasAddedTo_Entity(c3,e2)

# Account 2 (sees addition of k2/e2 before k1/e1)

# c1 + (k2,e2) ==> c2
  wasAddedTo_Coll(c2,c1)
  wasAddedTo_Key(c2,k2)
  wasAddedTo_Entity(c2,e2)

# c2 + (k1,e1) ==> c3
  wasAddedTo_Coll(c3,c2)
  wasAddedTo_Key(c3,k1)
  wasAddedTo_Entity(c3,e1)


What is the (asserted) content of c2 in a merging of these two
accounts? What value is under k1 in c3?

-- 
Stian Soiland-Reyes, myGrid team
School of Computer Science
The University of Manchester
Received on Tuesday, 25 October 2011 15:48:43 GMT

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