Hello John, (01)
On Wed, Oct 10, 2012 at 02:41:48PM -0400, John F Sowa wrote:
[Semantic MediaWiki]
> Note that their basic data structure is a typed list (AKA N-tuple) (02)
They are grouping all information about a subject in one data object. See also: (03)
http://semantic-mediawiki.org/doc/classSMWSemanticData.html (04)
But the properties they use always have a subject and one object, they do *not*
have n-ary relations/properties. This is why they can offer to store the data
in a triple store and use it for faster queries: (05)
http://semantic-mediawiki.org/wiki/Help:Using_SPARQL_and_RDF_stores (06)
A triple store is still a complex piece of software so it is no surprise that
they use MySQL as default. The interesting question is: Why is the data still
mirrored in MySQL when you configure a triple store ? (07)
> with the option of nested lists. (08)
I do not see anything new here. I could also say "The basic data structure
of RDF/XML is a typed list (AKA N-tuple) with the option of nested lists" and
it would be true but would say nothing about RDF. (09)
> The absence of any mention of logic or ontology in their announcement
> means that the SMW developers don't see a need for it -- yet. (010)
Basically yes - but have a look at: (011)
http://semantic-mediawiki.org/wiki/Help:Using_SPARQL_and_RDF_stores (012)
> But
> their use of MySQL, N-tuples, and typed N-tuples indicates that a
> logic and ontology that can support them would be highly desirable. (013)
N-tuples may be desirable or not but the implementation decisions of the
Semantic MediaWiki developers do not indicate this, IMO. (014)
Regards, (015)
Michael Brunnbauer (016)
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