[Crm-sig] New Issue: dimension intervals HELP!

Martin Doerr martin at ics.forth.gr
Sat Nov 10 17:42:06 EET 2018

Dear Richard, All,

I think we need some expert in the respective kinds of syntax. I hope 
there is someone on this list working more at the programming level. I 
am no more working at the programming level.
I believe from a general point of view, it is a non-issue. I regard this 
not a question of feasibility, but getting an IT guy trained in this. I 
hope someone on this list knows or knows who knows:-)

The example "feet/inches" and "degrees, minutes and seconds" is 
mathematically exactly the same as a date composed of "Year/month/day", 
even more simple, because their are no leap-years etc. So, since the one 
works, the others must work as well, in analogy.

The geometric primitives, for instance WKT strings, describe points and 
volumes in 3- or even 4-dimensional spaces. Since this works, any 
n-dimensional value can be represented in the same way.

A simple way is this:
In a literal, we can store any XML or JASON chunk, and represent the 
schema as "unit".

Of course, we need to spell this out:-)



On 11/9/2018 8:15 PM, Richard Light wrote:
> [reply trimmed to fit the list's size limits]
> -------- Forwarded Message --------
> Subject: 	Re: [Crm-sig] New Issue: dimension intervals
> Date: 	Fri, 9 Nov 2018 18:01:59 +0000
> From: 	Richard Light <richard at light.demon.co.uk>
> To: 	crm-sig at ics.forth.gr
> On 08/11/2018 20:00, Martin Doerr wrote:
>> Dear Richard,
>> It requires a sort of datatype or encoding.
>> Assume unit = "ft&inches"
>>                value = <3,6>
>> would that make sense?
>> In the xsd datatypes everything is in the value already.
> The XSD datatypes all resolve to single values, so don't give a clear 
> steer from them as to how to deal with the 'multiple units' issue.
> I can see what you're saying as regards a 'complex' datatype, but I 
> can't find examples on the Web of how the value would actually be 
> encoded as an RDF value which software agents could do anything useful 
> with.
> The best I have come up with is this document from 2002:
> http://infolab.stanford.edu/~melnik/rdf/datatyping/
This is correct but does not go into things like geoSPARQL. It does not 
advise how to make multidimensional values.
> which has some heavy hitters associated with it.  Is this the sort of 
> approach you are proposing?
> A slightly more complex example would be a geographical coordinate 
> expressed as latitude and longitude (both expressed as degrees, 
> minutes and seconds).
> Thanks,
> Richard
> -- 
> *Richard Light*
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  Dr. Martin Doerr
  Honorary Head of the
  Center for Cultural Informatics
  Information Systems Laboratory
  Institute of Computer Science
  Foundation for Research and Technology - Hellas (FORTH)
  N.Plastira 100, Vassilika Vouton,
  GR70013 Heraklion,Crete,Greece
  Email: martin at ics.forth.gr
  Web-site: http://www.ics.forth.gr/isl

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