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PROV-ISSUE-189: Section 5.2.4 (PROV-DM as on Nov 28) [prov-dm]

From: Provenance Working Group Issue Tracker <sysbot+tracker@w3.org>
Date: Wed, 07 Dec 2011 02:00:02 +0000
To: public-prov-wg@w3.org
Message-Id: <E1RY6ni-0007JH-8R@tibor.w3.org>

PROV-ISSUE-189: Section 5.2.4 (PROV-DM as on Nov 28) [prov-dm]

http://www.w3.org/2011/prov/track/issues/189

Raised by: Satya Sahoo
On product: prov-dm

Hi,
The following are my comments for Section 5.2.4 of the PROV-DM (as on Nov 28):

Section 5.2.4 Note Record
1. "Attribute-value pairs occurring in notes differ from attribute-value pairs occurring in entity records and activity records. In entity and activity records, attribute-value pairs must be a representation of something in the world, which remain constant for the duration of the characterization interval (for entity record) or the activity duration (for activity records). In note records, it is optional for attribute-value pairs to be representations of something in the world. If they are a representation of something in the world, then it may change value for the corresponding duration. If attribute-value pairs of a note record are a representation of something in the world that does not change, they are not regarded as determining characteristics of an entity or activity, for the purpose of provenance." 

Comments: The primary issue is - how is note record enabling provenance representation or interchange over and above the set of terms and relations defined by PROV-DM? If attribute-value pairs are determining characteristics of an Entity or Activity and also help in rendering them - are they not Note Record? For a common user or application, how do they determine if a set of attribute-value pairs are determining characteristics of an Entity or Activity? Would the original author of provenance assertions have to be around to convey this information to users or consumers of provenance information?
E.g.
entity (e1, [resolution: 1080p, format: UTF-8])
How does a user or software application intrepret that the attribute pairs [resolution: 1080p, format: UTF-8] are determining characteristics of e1 or not?
Further, what is meant by "...something in the world"? Section 2.1.1 describes world as "...the world (whether real or not), there are things, which can be physical, digital, conceptual, or otherwise, and activities involving things." - so what IS something in the world and what is NOT something in the world?


Thanks.

Best,
Satya
Received on Wednesday, 7 December 2011 02:00:04 UTC

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