On 14.09.2012 20:04, jmcclure@hypergrove.com wrote:
I'm particularly keen to know how this facility relates to fielding application-level ontologies. thanks - john
It doesn't, this is only about pre-defined "primitive" data types like "Number" or "Translated String" or, slightly more complex, "Geo-coordinate".
The original implementation was discarded, the current draft is at http://meta.wikimedia.org/wiki/Wikidata/Development/Data_values_and_types
Once we have full support for free-form properties in Wikidata, we expect something like a "Folksonomy" to emerge, but since we don't plan to enforce any constraint based on a class system or similar, a true ontology in the RDFS/OWL sense is unlikely to appear. We hope however that the relations and properties we collect about items will be useful in building such an ontology in other systems.
-- daniel