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RE: alternate example in primer

From: Miles, Simon <simon.miles@kcl.ac.uk>
Date: Tue, 13 Nov 2012 17:57:22 +0000
To: W3C provenance WG <public-prov-wg@w3.org>
Message-ID: <830EEE5C741ED54EAB28EBACFFC77984EEC0890670@KCL-MAIL04.kclad.ds.kcl.ac.uk>

We should discuss this in a teleconference.

This text is explicitly referenced in the responses to Robert Freimuth approved by the WG on Saturday, which have now been sent to him. Only Tim made any comment on it, and that was largely positive. I do not think it is right to be changing this subsection at the same time as asking Robert to approve the text already there.

Moreover, both Yolanda and I are concerned that the dereferencing example suggested sounds too confusing for the primer and is less clear than the example that is currently there.


Dr Simon Miles
Senior Lecturer, Department of Informatics
Kings College London, WC2R 2LS, UK
+44 (0)20 7848 1166

Modelling the Provenance of Data in Autonomous Systems:

From: Luc Moreau [l.moreau@ecs.soton.ac.uk]
Sent: 13 November 2012 14:46
To: W3C provenance WG
Subject: alternate example in primer


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<mailto:l.moreau@ecs.soton.ac.uk>
United Kingdom                     http://www.ecs.soton.ac.uk/~lavm
Received on Tuesday, 13 November 2012 17:58:46 GMT

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