Re: RDF* semantics

On 8/5/19 10:09 AM, Olaf Hartig wrote:
> As an example regarding the latter, consider an RDF* graph that contains
> only the following nested triple (prefix declarations omitted).
>
> ( (:bob, foaf:age, 23), dct:creator, :crawler1 )
>
> Furthermore, assume the following SPARQL* query.
>
> SELECT * WHERE { :bob foaf:age ?a }
>
> In PG mode, the result of this query over the given RDF* graph consists
> of a single solution mapping m with m(?a)=23. In contrast, in SA mode,
> the query result is empty.


Hi Olaf,

Under what circumstances in the real-world would the condition you model
arise i.e., propositions that don't manifest as part of documentation?

All sentences/statements are inscribed to documents that have provenance
oriented properties such as date, time, author etc..

What I am trying to articulate here is that its a combination of the
sentence and document (in which they are inscribed) that brings
authority (or lack thereof) to a proposition represented as an RDF
sentence/statement.

The triple:

@prefix : <#> .

:bob foaf:age "23"^^xsd:integer . 

Exists in a document identified by <> , so we a missing the following part of reality (as I understand it):

@prefix : <#> . 

<> a foaf:Document .
<> :creator :i .
<> :createdOn "2019-08-05"^^xsd:date . 
<> foaf:primaryTopic :bob. 

:bob foaf:age "23"^^xsd:integer . 


Thus, it's the authoritative weight given to <>, by whoever, under whatever situation and circumstance, that leads to acceptance or rejection of the claims outlined e.g., those about the foaf:age of the entity identified by :bob . 

If we get the world we a modeling for clear, other bits of the problem
will become clearer.

Conclusion:

In my opinion, we need a complete example that's relatable to the world
that we are describing using RDF sentences :)

-- 
Regards,

Kingsley Idehen       
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