It seems to me that the Activity of performing the music described in the
notation is the activity that has the P33_used_specific_technique relationship
to the E29.
Thus:
_:performance a E7_Activity ;
p14_carried_out_by <san_francisco_symphony_orchestra> ;
p16_used_specific_object <sfs_copy_of_score> ;
p33_used_specific_technique [
a E29_Design_or_Procedure ;
rdfs:label “Ode to Joy” ;
p128i_is_carried_by <sfs_copy_of_score> ] .
If that activity creates something, then it must be at least a E71 Man-Made
Thing as all activities are carried out by Men. I mean humans. [I will leave
the sexist language of the labels to a separate issue] I agree that E29 could
refer to E71 rather than E24 – a set of design principles for reflecting upon
the CRM ontology is a plan for creating conceptual objects. As is a mathematics
lesson plan or a philosophy text book.
As to whether a performance is a physical or conceptual man-made thing …
To me, a performance as an entity that is created by the activity of playing a
musical instrument or singing is a very transitory physical phenomenon, notably
the modulation of air pressure into sound waves that can be measured and
captured by analog or digital devices. The same way that we can photograph an
object by recording its reflected light, we can record a performance by
recording its sound waves. We then replay the performance by replaying the
sound, in the same way as we replay a photograph by looking at the light it
reflects. The notion of persistence in E24 is inherited from E77, where it is
clarified as persistent identity, not persistent form or state. If the
performance was a conceptual object, then it would not be able to be recorded,
only described. The “conceptual performance” is the equivalent of the E36
Visual Item – the same “Coca-Cola logo” exists in all physical objects that
show the visual item. I would thus add Exx_Auditory_Item to mirror E36. One
might then have an additional subclass of both E36 and Exx to represent
performances more generally, where the visual and auditory aspects are both
represented, such as theatre or dance, or that might be captured by
video-recording the orchestra rather than just recording the sound.
Rob
From: Crm-sig <[email protected]> on behalf of Athanasios Velios
<[email protected]>
Reply-To: "[email protected]" <[email protected]>
Date: Thursday, August 9, 2018 at 8:51 AM
To: crm-sig <[email protected]>
Subject: [Crm-sig] Design or Procedure and Physical Things
Dear all,
With the usual apologies for possibly having misunderstood or missed
something. I propose that the scope note of E29 Design or Procedure
changes from:
"... In particular it comprises plans for deliberate human activities
that may result in the modification or production of instances of *E24
Physical Thing*..."
to:
"... In particular it comprises plans for deliberate human activities
that may result in new instances of *E71 Man-Made Thing or E7 Activity*..."
Reason for including E7:
One of the current examples under E29 is:
"the musical notation for Beethoven’s “Ode to Joy”"
I do not see how the musical notation can result in the production of a
physical thing. Also I think it is a contradiction to "P33 used specific
technique" for which the domain is E7 Activity (and also to F25
Performance Plan which is a sub-class of E29 Design or Procedure).
Reason for including E71:
Consider the example of using a digital camera. I setup the camera
following instructions. But when I shoot the image (as explained in
CRMdig) I create a new information object and not a physical thing.
Note: The current scope note says "may", but I take this to mean that a
physical thing may or may not be produced, and not that it may or may
not be a physical thing (i.e. to be something entirely different).
All the best,
Thanasis
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