Richard,
On 10/9/2019 6:34 PM, Richard Light wrote:
Martin,
I'm not sure I particularly like the phrase 'identifiers in continua'
- but maybe I just don't understand its intended meaning. To me, a
date is just a data value, expressed to a certain degree of precision.
An 'identifier' suggests something which is deliberately assigned as a
property of an entity, in order to ... identify it.
A date is a numerical distance from a starting point, e.g. a zero
redefined every time the precision increases. A geocoordinate refers to
Greenwich, etc. Therefore they are NOT values, but absolute points in
space time. Not quantities.
In any case, if we are defining and giving examples of these
identifiers, shouldn't we be
Yes E41 need rewriting. I work on it. All examples from deprecated
classes need to be transferred.
Thank you!
Martin
Whatever these identifiers are, they won't be E50 or E47, both of
which are flagged as deprecated (and now to be treated as E41
Appellation).
Richard
On 08/10/2019 17:59, Martin Doerr wrote:
Dear All, we need to provide other definitions of identifiers in
continua.
E60 Number
Subclass of:E59 <#_E59_Primitive_Value> Primitive Value
Scope Note:This class comprises any encoding of computable
(algebraic) values such as integers, real numbers, complex numbers,
vectors, tensors etc., including intervals of these values to express
limited precision.
Numbers are fundamentally distinct from identifiers in continua, such
as instances of E50 Date and E47 Spatial Coordinate, even though
their encoding may be similar. Instances of E60 Number can be
combined with each other in algebraic operations to yield other
instances of E60 Number, e.g., 1+1=2. Identifiers in continua may be
combined with numbers expressing distances to yield new identifiers,
e.g., 1924-01-31 + 2 days = 1924-02-02. Cf. E54 Dimension
Examples:
§5
§3+2i
§1.5e-04
§(0.5, - 0.7,88)
In First Order Logic:
E60(x) ⊃E59(x)
--
------------------------------------
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
Vox:+30(2810)391625
Email:[email protected]
Web-site:http://www.ics.forth.gr/isl
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*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
Vox:+30(2810)391625
Email: [email protected]
Web-site: http://www.ics.forth.gr/isl
