Dear Francesco,
In support of your answer to Thanasis below:
On 2/19/2019 10:53 AM, Francesco Beretta wrote:
Dear Thanasis
Le 18.02.19 à 22:38, Athanasios Velios a écrit :
I like this scope note but my only concern is that an observer cannot
tell when one phase ends and the next one begins. How can we explain
that a phase is no longer?
The whole discussion concerning 'phases' (to avoid the unclear term of
states), which reappearred in the last years because of the insistent
questions of the (art) historians, is about distinguishing —if I got
it right— between the phenomenal and the epistemological perspective.
Martin's proposal about modelling phases of appearances, behaviors,
etc. makes the point of identifying a phenomenal temporal entity with
a specific identity as 'phase', observable in the evolution of an
instance of E18 Physical Thing.
Yes
Your very relevant question challenges this attempt by implicitly
suggesting that the absence of clear 'borders' (temporal limits with
clear, substantial appearance) of the phase do not allow to truly
distinguish one phase from the next one. One could say that a phase is
just about our observation, therefore purely epistemological (in the
sense of State – S16).
The case is clear if an event brings a substantial change in the
'phase' like going to the hairdresser and changing the color of my
hair. The substance of phases, in the perspective of historians, is
that appearances, behaviours, social qualities, etc. (which we will
certainly will have to define more precisely, providing examples)
change over time and are significantly (i.e. substantially) different.
But this can also happen if phases change through a long lasting
process with no clear temporal borders. They are objectively
recognizable as such.
Yes
The issue would then seems to be: phenomenal and not epistemological
if clear temporal limits ? But, to turn the issue around, also events
have phenomenal substance even if, sometimes, they do not have clear,
or knowable temporal limits, and we have conceptual tools to cope with
this in the CRM. Wouldn't they be suitable to be applied to 'phases' ?
I think the requirement of clear temporal limits is not the best
criterion. For me, it is a distinctness in substantial qualities, that
provide a certain coherence within the phase. For instance, we
distinguish babies, adolescents and adults in the human life cycle. The
sexual maturity being, for instance, a marker between phases, as well as
reaching the final body size. On the other side, there are certain large
snakes, such as the anaconda, which appear just to continue growing more
or less until they die.
Indeed, if we agree about the existence of something substantial in
phases (probably a substance different for different subclasses of
Persistent items).
Yes, and there should be enough subclasses. Cut hair etc. are not really
our concern, but we can think of phases of a Feature which are not a
phase of the bearing Object simultaneously.
Both questions remain open in my perspective. But very relevant, at
least for the historians.
All the best
Francesco
All the best,
Thanasis
On 17/02/2019 19:44, Martin Doerr wrote:
Dear All,
Here a first attempt to define "phase":
Exxx Phase
Subclass of: E2 Temporal Entity
Superclass of:E3 Condition State
Scope note:This class comprises phases during the existence and
evolution of an instance of E18 Physical Thing characterized by an
appearance, constitution or a behavior distinct from that in other
times
of its existence, or distinct in the evolution of things of comparable
kind, such as the nestling, fledgling, juvenile and adult forms of
birds, but some kinds of phases may also be consequence of incidental
changes such as accidents.
Best,
Martin
--
------------------------------------
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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------------------------------------
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
