Dear all, To make certain that I understand the distinctions being drawn by applying Phase and State to the use cases I sent during the SIG meeting in November, they fall into the categories in my email of social state and physical phase (a good mnemonic for which is which!):
* Ownership – initiated and terminated by an Acquisition, expresses the temporal validity of has_current_owner (and similarly custody of the object) This is a binary temporal relationship between an actor (the owner) and a thing (the object), and thus a Social State. * Identification / Naming -- temporal validity of a P1_is_identified_by between something and an Identifier This is a ternary temporal relationship between an actor (the namer), a thing (the named object), and an appellation (the name). Similarly valuation, but to a Monetary Amount instead of an Appellation. This is very similar to AttributeAssignment, but with temporal qualities. * Usage -- a thing was used in a particular way (e.g. a building was a church, then a restaurant) An actor (the Group that uses it), a thing (the building), and a Type (the sort of usage) * Profession, Gender, Nationality (and other classifications) of a Person These don’t fall into the current definition as there’s no Thing involved other than the Person? Or is the person the “thing”, and the society is the Actor? Then my two physical cases, which are Phases: * Change of dimensions – The Night Watch was cut down in 1715. This is observable and thus continues to be valid with the addition to the scope note. * Existence – Picasso’s Le Peintre exists from its production in 1963 until 1998, when its Destruction was caused by the crash of Swissair Flight 111. In between there is a Phase when the painting observably existed. Right? Rob From: Crm-sig <[email protected]> on behalf of Martin Doerr <[email protected]> Date: Wednesday, February 20, 2019 at 12:46 PM To: "[email protected]" <[email protected]> Subject: Re: [Crm-sig] Issue 369, Phase Dear All, Tentatively here an extension of my previous scope note. If it becomes more controversial, we may drop it: 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 a substantial 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. Begin and ending of an instance of ExxxPhase is regarded to be observable, regardless how fuzzy they are, by the contrast of the prevailing conditions that characterize the phase to the times before and after. It is the kind of phase that determines which kinds of conditions identify it. Different kinds of phases may overlap on the same instance of E18 Physical Thing. Non-substantial properties, such as being owner of something, do not justify a phase. Best, Martin On 2/19/2019 8:21 PM, Martin Doerr wrote: Dear Thanasi, On 2/19/2019 7:13 PM, Athanasios Velios wrote: 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. So the surface enters a phase of developing 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. Yes 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?). I meant "Phase" to be superclass of Condition State. I wrote "but some kinds of phases may also be consequence of incidental changes such as accidents." to make clear that it is not only evolution. 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". Yes, I know I made something nearly cyclic here, but I narrowed a general notion of phase very much down by the following conditions. I was tempted to write time span in order to avoid "phase", but I have the impression that would come too close to the epistemological point of view of arbitrariness. If we talk about a "phase", I at least imply much more of a substantial coherence within the phase. Indeed, the comments we received so far suggest that "phase" in the linguistic sense is a much wider concept. We could add and adjective to my definition to make it clearer, but I found no good adjective either (material? substantial? behavioural? all seems to be more special). All the best, Martin 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]<mailto:Email:[email protected]> Web-site:http://www.ics.forth.gr/isl _______________________________________________ Crm-sig mailing list [email protected]<mailto:[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. If you are not the intended recipient of this email and/or its attachments you must not take any action based upon them and you must not copy or show them to anyone. Please send the email back to us and immediately and permanently delete it and its attachments. 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Registered Office: University of the Arts London, 272 High Holborn, London WC1V 7EY _______________________________________________ Crm-sig mailing list [email protected]<mailto:[email protected]> http://lists.ics.forth.gr/mailman/listinfo/crm-sig -- ------------------------------------ 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]<mailto:[email protected]> Web-site: http://www.ics.forth.gr/isl
