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Re: [ontolog-forum] URIs [was: Truth]

To: ontolog-forum@xxxxxxxxxxxxxxxx
From: Kingsley Idehen <kidehen@xxxxxxxxxxxxxx>
Date: Thu, 12 Jul 2012 15:45:27 -0400
Message-id: <4FFF2957.8070102@xxxxxxxxxxxxxx>
On 7/12/12 3:42 PM, Steve Ray wrote:
> I'm willing to live with multiple authorities, as long as they provide
> stable URIs that I can point to. Then at least people can find out what
> definitions I'm using in my models.
+1    (01)

> - Steve
> Steven R. Ray, Ph.D.
> Distinguished Research Fellow
> Carnegie Mellon University
> NASA Research Park
> Building 23 (MS 23-11)
> P.O. Box 1
> Moffett Field, CA 94305-0001
> Email:    steve.ray@xxxxxxxxxx
> Phone: (650) 587-3780
> Cell:      (202) 316-6481
> Skype: steverayconsulting
> -----Original Message-----
> From: Ed Barkmeyer [mailto:edbark@xxxxxxxx]
> Sent: Thursday, July 12, 2012 11:57 AM
> To: steve.ray@xxxxxxxxxx; [ontolog-forum]
> Subject: Re: [ontolog-forum] URIs [was: Truth]
> Steve Ray wrote:
>> Matthew,
>>      I completely agree with you, and would be interested to hear from
>> this group what they believe are authoritative URIs for common data
>> types such as:
>> Float (or Real)
>> Integer
>> Boolean
>> String
> I have never met a datatype term that the information technology community
> couldn't argue about indefinitely.
> The problem is:  Who is the registration authority for things like this?
> And who is willing to concede that authority?  The W3C attitude is that
> these have been defined in XML Schema part 2: Datatypes.  The JCP attitude
> is that, for matters related to Java, the Java standards are the authority
> for such datatypes.  Fortunately, tthe JCP lot were able to convince W3C to
> use their types in XML Schema, but then, so were the SQL folk, and most
> modelers prefer xsd:integer to xsd:long as the name for Integer.  And the
> ISO 11179 "metadata registry" folk think the registered names are ISO URIs
> for 'technical elements' of ISO 11404.
> What we have is multiple communities who claim the authority, based on
> having published standards for certain implementation communities.
> So it seems to me that we will get multiple URIs for these datatype
> concepts, each of which has a definition in a standard written by whichever
> community owns that URI.  And some poor souls will have to determine whether
> the extensions of the defined concepts are really the same, or were intended
> to be, or not.  And then they will have to get everyone to agree that their
> repository of equivalences or subtypes or whatever is authoritative.  In
> short, nomenclature standards really don't work over large communities until
> the supporting technology stops changing.  And if we have to agree on both a
> term and its definition, it will be even harder.
> In a similar way, Matthew is certainly right about Ferraris, but who is the
> internationally accepted authority for motor vehicle terminology?
> ODETTE?  Is it a "hood" or a "bonnet" or some other bizarre term no one
> actually uses?  Does everyone agree on the meaning of "power train"?
>> And then, thoughts on the same for measured quantities such as:
>> AbsoluteDateTime
>> Duration
>> (I'll stop here for now)
> Yeah.  You don't want to put the objective any further than Arhhem.  But you
> are already a bridge too far.
> The unarguable authority for what Steve calls 'duration' is BIPM, reference
> source for all the basic measurement concepts.  Their publications, e.g.,
> the International System of (measurement) Units (SI), refer to that kind of
> quantity as 'time'.  The generally agreed upon authority for date and time
> expressions is ISO 8601, but I don't think it uses the term "Absolute Date
> Time" at all.  Unlike computational datatypes, which change with technology,
> however, these latter concepts have established international authorities.
> There is still the issue of whether everyone agrees on the nomenclature for
> those concepts, as Steve's choice of terms indicates. This is not really a
> problem in RDF.  The term is not 'time' or 'duration', it is
> "http://www.bipm.org/publications/SI#time";, or something very similar.
> The problem arises from humans trying to interpret only the last 4
> characters of that URI, without visiting the site and examining the
> definition.  As in most such things, we have met the enemy and they is us.
> -Ed
>    (02)

--     (03)

Regards,    (04)

Kingsley Idehen 
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter/Identi.ca handle: @kidehen
Google+ Profile: https://plus.google.com/112399767740508618350/about
LinkedIn Profile: http://www.linkedin.com/in/kidehen    (05)

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