Dear Robert,
On 11/15/2018 8:11 PM, Robert Sanderson wrote:
Some scoping questions, that might be obvious or might help clarify
the discussion…
The National Fire Protection Association is responsible for the safety
diamond, that has Health (blue), Flammable (red) and Reactivity
(yellow) ratings for the sample or area, each of which is measured
from 0-4. This seems like a quantified numeric value with a
particular unit. Is that then a Dimension, like:
_:x a Dimension ;
P2_has_type <health safety> ;
P90_has_value 3 ;
P91_has_unit <nfpa_unit> .
I'd argue this can not be measured by calibrated means. hence it is not
a Dimension, but a set of types, no matter that they are decorated with
numbers.
Color can be measured, but to be useful has three component parts.
Pure red could be expressed as 256 red, 0 green, 0 blue. A type of
redness, a value of 256, and a unit of hexademical color proportion
(e.g. as per
https://www.w3.org/TR/2018/REC-css-color-3-20180619/#rgb-color or the
standard for sRGB)
This would be most usefully expressed as a partitioning of an overall
color dimension. This would be a second example of dimension
partitioning to go along with non decimal unit systems (feet and
inches, etc.) or currencies (florins, etc).
Yes, sure, valid. To be discussed in Berlin. Each custom datatype needs
a syntax, and string function to take it apart. This should come from
other communities that have solved the issue. Then we import this.
Best,
Martin
Thoughts?
Rob
--
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Dr. Martin Doerr
Honorary Head of the
Center for Cultural Informatics
Information Systems Laboratory
Institute of Computer Science
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