Dear All,
I'd like to remind you that RDF-OWL is only a historical phenomenon in
the history of knowledge representation.
The CRM needs to define semantics that cover E-R, TELOS, KL-One, KIF,
OIL, DAML-OIL, DL, RDFS, XML, Jason, and whatever will come up.
Therefore we define it in FOL.
The puzzling gap to primitive values has on one side to do with
hardware, which cannot cover infinite mathematical spaces. Consequently,
each machine and encoding convention uses a different subset.
The other difference is deeper: On the machine, you can only use
identifiers to talk about things. Digital objects themselves can be in
the machine, but not necessarily are, and all others cannot. This causes
a semantic gap which is common to all database schemata, and needs to be
resolved by a series of practical conventions separately for each
datamodel. It can only be resolved by having an ontology, which in the
first place makes the distinction, so that it becomes clear, what each
database schema describes about the world and what description is.
I hope this makes things theoretically clearer: The puzzle is what is
information itself.
Best,
Martin
On 2/28/2018 10:39 AM, Conal Tuohy wrote:
I have used rdf:value for this purpose.
https://www.w3.org/TR/rdf-schema/#ch_value
The CRM's origin was outside of the RDF space, and it is still
considered to be something more abstract than any concrete expression
in RDFS or OWL. This is why, I think, there remains a puzzling gap
between RDF resources which are instances of CRM classes and their
literal values which must be expressed using primitive RDF data types.
The point of rdf:value, as I understand it, is to fill in gaps like
these.
On 22 February 2018 at 02:04, Carlisle, Philip
<philip.carli...@historicengland.org.uk
<mailto:philip.carli...@historicengland.org.uk>> wrote:
Dear all,
Naïve question.
Is there any reason why P90 has value could not/should not change
its domain and range from:
Domain: Range
E54 Dimension E60 Number
to
E1 CRM Entity E59 Primitive Value
I look forward to you answers
Phil
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