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alternate example in primer

From: Luc Moreau <l.moreau@ecs.soton.ac.uk>
Date: Tue, 13 Nov 2012 09:46:08 -0500
Message-ID: <EMEW3|3e335ace19c0807e88610683a0c30724oACG2a08l.moreau|ecs.soton.ac.uk|50A25D30.9070000@ecs.soton.ac.uk>
To: W3C provenance WG <public-prov-wg@w3.org>

When preparing the PROV tutorial at ISCW'12, we discussed the example 
for alternate in the primer.

, /if a file is copied from one directory to another, we may want to say 
that (according to our model) these are both the same file, just in a 
different location. We may say that the file in the first directory, F1, 
is an alternate of the file in the second directory, F2. Note that it is 
the context (location) rather than content of the file that differs 
between the entities in this case.

/We didn't find this example as the most compelling.

  I don't think that in general, copying a file creates  an alternate. 
If file f2 is a copy of file f1, I don't know what same thing, f1 and f2 
present a same aspect of. And while there is some form of caveat 
"accordign to our model", this example may be confusing for readers.

Instead of this example, we decided to use a content negotiation example:

Dereferencing a url requesting different mime types eg. turtle or 
rdf/xml, returns two entities that are alternate of each other.

If we are in agreement, can we change the primer accordingly?


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
Received on Tuesday, 13 November 2012 16:03:26 GMT

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