Re: SQL to RDF access ?

On 10/13/15 12:52 PM, Kingsley Idehen wrote:
> On 10/2/15 10:47 AM, Jerven Bolleman wrote:
>> Hi,
>>
>> In Oracle, I think you can create a view on a select on sem_match. e.g.
>>
>> CREATE VIEW proteinOrganism AS
>> SELECT p AS PROTEIN, o AS ORGANISM FROM TABLE(SEM_MATCH(
>> 'PREFIX c:<http://purl.uniprot.org/core/> SELECT ?p ?o WHERE {?p a
>> c:Protein . ?p c:organism ?o}',
>> SEM_MODELS('UNIPROT_2015_08'), null, null, null));
>>
>> Something similar is possible in Virtuoso, and surely DB2
>>
>> In PostgreSQL, you could use
>> https://github.com/cyga/www_fdw/wiki/Documentation
>> to map sparql results into views.
>>
>> However, all will requires certain maintenance workloads.
>>
>> For the experimental stuff you could look at MonetDB/RDF or
>> Virtuoso-CS (not yet public)
>> http://homepages.cwi.nl/~duc/papers/emergentschema_www15.pdf
>> <http://homepages.cwi.nl/%7Educ/papers/emergentschema_www15.pdf>
>>
>> Regards,
>> Jerven
>>
>
> Virtuoso translates SPARQL to SQL at its core i.e., that's what
> Virtuoso is, fundamentally.
>
> Virtuoso also let's you leverage RDF Relations constructed from SPARQL
> in the FROM CLAUSE of a SQL Query (we call this SPASQL, and it's
> existed since day one).
>
> Here is a simple SPASQL Query where an RDF relation is used in the SQL
> FROM CLAUSE:
>
> SELECT "x"."o"
> FROM (SPARQL SELECT DISTINCT ?o  {?s rdf:type ?o} LIMIT 100) AS  "x"
>
> Links:
>
> [1] http://bit.ly/spasql-query-demo-entity-types -- Live instance of
> SQL and/or SPARQL Query Tool

Forgot to mention, when challenged for credentials, its "vdb" for
username and pwd.

-- 
Regards,

Kingsley Idehen       
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OpenLink Software     
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