[crm-sig] Issue 56,63,64

martin martin at ics.forth.gr
Fri Jan 18 23:34:53 EET 2002


Issue 56: Objects which are typical for a class

I propose to regard any "Stuff" as a candidate for archetypical or prototypical role.

Proposal:

Stuff: was prototype of (had prototype) : Type

Stuff: is an archetype of (has as an archetype) : Type

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Issue 63:  Does the Appellation need a value property?

Proposal for new scope note:

E41 Appellation

Scope note: This entity comprises all names in the proper sense. Codes or words, meaningless or meaningful, in the script of some group or encoding of an electronic system, used solely to identify a
specific instance of some category within a certain context. These words do not identify the object by their meaning but by convention, tradition or agreement. In contrast to other entities an
instance of Appellation is not an identifier for a real world entity different in nature from it, but it is the appellation itself. E.g. an Appellation "Martin" does not refer to any
Martin, but is nothing else than the name "Martin" itself. Therefore there is no property pointing to any value of it. Appellation should not be
confused with the practice of naming a thing by some group over a certain period. The latter is not modelled in the CIDOC CRM.

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Issue 64: The definition of number is too narrow:

E60 Number:

Scope Note: Integers, real or complex numbers.

Proposal:

Scope Note: This entity comprises any encoding of computable (algebraic) values, like integers, reals, complex numbers, vectors, tensors etc.
They are fundamentally distinct from identifiers in continua, like dates and spatial coordinates, even though their encoding may be similar.
Whereas numbers can be combined with numbers to yield numbers in algebraic operations, identifiers in continua are combined with numbers
expressing distances to yield identifiers. Instances of entity Number are the encoding itself, in contrast to the real world quantity measured by
them. So one real world quantity can be measured by different numbers, based on the system of units and the procedure. E.g. 100 Greek
Drachme are equal to 340.447 Euro. Examples: 5, 3+2i, 1.5e-04, (0.5,-0.7,88)

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Martin

--

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 Dr. Martin Doerr              |  Vox:+30(81)391625          |
 Principle Researcher          |  Fax:+30(81)391609          |
                               |  Email: martin at ics.forth.gr |
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               Information Systems Laboratory                |
                Institute of Computer Science                |
   Foundation for Research and Technology - Hellas (FORTH)   |
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