Thank you Francesco and Martin for articulating my question properly. I can understand that we can already deal with the fuzzy temporal boundaries of a phase. Martin's "observable properties" makes it clearer for me and perhaps it is worth emphasising in the scope note.
1) Examples of observable properties in conservation: * "pitting" is a type of damage on metals where small pits are formed on the surface filled with metal salts and oxides. The existence of white/light green powder in localised spots on copper is one property to help observe pitting. * "not functional" is what we call machines in industrial heritage collections which used to perform a function, such as a printing machine, but they no longer do because they are broken. The observable property is that the machine has the capacity to print paper. 2) However, thinking about this further (and I hope I am not going into circles) I am struggling to articulate the differences between Phase and E3 Condition State. They both apply to E18 Physical Thing. Martin says in an email on 22/11/2018 that "Phase is like Condition State bound to the evolution of a thing". This sounds like it should be a sub-class of Condition State, i.e. states that are only related to evolution. Francesco, if I understood correctly, refers to change of state also for non E18 Physical Things, i.e. epistemological as well as phenomenal (is this correct Francesco?). 3) I propose to change the first sentence of the scope note from: "This class comprises phases during the existence..." to: "This class comprises temporal spans(?) during the existence..." to avoid saying that a "Phase is a phase". All the best, Thanasis On 19/02/2019 11:12, Martin Doerr wrote: > Dear Thanasi, > > I understand. This may need more elaboration. The type of the phase > determines the characteristic observable properties. We should see > examples. > > These properties may begin and end fuzzily, but that does not affect the > concept, as long as inner-outer bounds can be assigned. > > Best, > > martin > > On 2/18/2019 11:38 PM, Athanasios Velios wrote: >> 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? >> >> 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 >>> >>> >>> _______________________________________________ >>> Crm-sig mailing list >>> [email protected] >>> http://lists.ics.forth.gr/mailman/listinfo/crm-sig >>> >> This email and any attachments are intended solely for the addressee >> and may contain confidential information. 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