Issue 476: Pxx represents entity of type

ID: 
476
Starting Date: 
2020-02-24
Working Group: 
3
Status: 
Proposed
Background: 

Posted by Richard Sanderson on 19/2/2020

Dear all,

(Last new issue for now, I promise)

When describing a Visual Item, we can say that it represents some entity that you can point to (e.g. the sitter), that it is about some subject that you can’t point to (e.g love) and it can have general classifications with has type for style (abstract) or other such features of the overall visual content. However, it would be useful to be able to say that a class of entity is represented in the visual item rather than a specific entity. 

We have tried several approaches to this. If we want to say that a still life painting depicts flowers, we would not want to create a Biological Object and classify it as a flower to be represented by the visual item of the painting … such a flower may never have actually existed, and it would be enormously expensive. Equally we don’t think that the Type “flowers” is represented in the painting … it’s a not a depiction of all flowers, it’s a depiction of some, likely fictional, collection of specific flowers.

So we would propose a new property that parallels P138 represents, but instead refers to a class of entity rather than a specific.

We can see this pattern already in the model:

P16 used specific object    vs   P125 used object of type

P20 had specific purpose     vs    P21 had general purpose

P33 used specific technique    vs   P32 used general technique

P108 has produced    vs    P186 produced thing of product type

 

Pxx represents entity of type

Domain: E36 Visual Item

Range: E55 Type

Sub Property Of P138 Represents

This property establishes the relationship between an E36 Visual Item and an E55 Type that represents the class of entity which it visually represents.  This property is used when the specific entity being represented is either unknown, or not of documentary interest.  The manner or mode of the representation can be captured using Pxx.1 mode of representation.

 

Properties:  Pxx.1 mode of representation: E55 Type

 

Examples:

    The still life painting’s image content (E36) represents and entity of type flowers (E55)
    The sculpture’s visual content (E36) represents an entity of type woman (E55)
    The photograph’s visual content (E36) represents an entity of type beach (E55) in the manner of background (E55) 

 

 

Thoughts?

Posted by Nicola Carboni on 25/2/2020

Dear Rob,

I do agree with the need and the formulation, and it can be extremely useful for iconographical attributes (which are intentionally classified using categories). I did personally used the same construct in an extension of CRM for iconographical representation, so would love to see it in CRM base.

    Sub Property Of P138 Represents

What about making it as subproperty of "P137 exemplifies (is exemplified by)". It does seems to me more appropriate.

    This property establishes the relationship between an E36 Visual Item and an E55 Type that represents the class of entity which it visually represents. This property is used when the specific entity being represented is either unknown, or not of documentary interest. The manner or mode of the representation can be captured using Pxx.1 mode of representation.

I would not use a negative ("not of documentary interest") and say "This property is used when the specific entity being represented is either unknown, or for documenting the belonging of an item to a specific category" or another more positive formulation. In my experience, the choice of the classification of categorical vs instance depends on the discipline and not by a lack of documentary interest.

Another example could be:

    The attribute of the wall painting "Saint George" (E36) represents an entity of type dragon (E55) in the manner of Iconographical Attribute (E55)