Issue 342: 3d Model example in P138

Starting Date: 
2017-09-14
Status: 
Proposed
Background: 

Posted by Robert Sanderson on 18/4/2017

All,

Perhaps something we can agree on … but we’ll see…

The second example of P138 represents describes a 3D model (an E73) that represents a sculpture.  However P138 represents is defined with a domain of a sub-class of E73, E36.
That means that digital 3D model files are actually considered to be E36 Visual Items.  Is that correct?

If so, can we update the scope notes of E36 to include that, and change E73 to E36 in the example for P138.

If not … can we remove that example? And how /would/ you link a 3D model to the work that it … represents?

Posted by Martin on 18/4/2017

Dear Robert,

Thank you for spotting the error!

Current text:
P138 represents (has representation)

Domain:                              E36 Visual Item

Range:                  E1 CRM Entity

Subproperty of:  E89 Propositional Object. P67 refers to (is referred to by): E1 CRM Entity

Quantification:   many to many (0,n:0,n)

 

Scope note:         This property establishes the relationship between an E36 Visual Item and the entity that it visually represents.

 

Any entity may be represented visually. This property is part of the fully developed path from E24 Physical Man-Made Thing through P65 shows visual item (is shown by), E36 Visual Item, P138 represents (has representation) to E1 CRM Entity, which is shortcut by P62depicts (is depicted by). P138.1 mode of representation allows the nature of the representation to be refined.

 

This property is also used for the relationship between an original and a digitisation of the original by the use of techniques such as digital photography, flatbed or infrared scanning. Digitisation is here seen as a process with a mechanical, causal component rendering the spatial distribution of structural and optical properties of the original and does not necessarily include any visual similarity identifiable by human observation."

 

Properties:           P138.1 mode of representation: E55 Type

 

Examples:          

§  the digital file found at http://www.emunch.no/N/full/No-MM_N0001-01.jpg (E36) represents page 1 of Edward Munch's manuscript MM N 1, Munch-museet (E73) mode of representation Digitisation(E55)

§  The 3D model VAM_A.200-1946_trace_1M.ply (E73) represents Victoria & Albert Museum’s  Madonna and child sculpture (visual work) A.200-1946 (E22) mode of representation 3D surface (E55)

example must be:

Examples:          

§  the digital file found at http://www.emunch.no/N/full/No-MM_N0001-01.jpg (E36) represents page 1 of Edward Munch's manuscript MM N 1, Munch-museet (E22) mode of representation Digitisation(E55)

§  The 3D model VAM_A.200-1946_trace_1M.ply (E36) represents Victoria & Albert Museum’s  Madonna and child sculpture (visual work) A.200-1946 (E22) mode of representation 3D surface (E55)

Posted by Franco on 18/4/2017

Dear Robert

I have been following your remarks in the last few weeks, but for lack of time could not comment on them.

However, I can do that on your latest messsge. My comment is the following question: what is a (digital) 3D model?

I think I know (a good approximation of) the answer but I am not sure everybody does. Of course the definition must be robust enough to pass the Ontoclean test.

Asking the above also puts a shadow of unclarity also on (digital) photos and the like. Maybe this is not relevant to CRM, maybe it is. Apologies if the question is off-topic.

Meetings discussed: