Hi Ankit, Note also the following documentation on the sponger usage and invocation of pragmas for controlling sponger behaviour:
http://docs.openlinksw.com/virtuoso/virtuososponger.html#virtuosospongerusage
Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc. // http://www.openlinksw.com/
Weblog -- http://www.openlinksw.com/blogs/
LinkedIn -- http://www.linkedin.com/company/openlink-software/
Twitter -- http://twitter.com/OpenLink
Google+ -- http://plus.google.com/100570109519069333827/
Facebook -- http://www.facebook.com/OpenLinkSoftware
Universal Data Access, Integration, and Management Technology Providers
> On 2 Nov 2014, at 21:23, Kingsley Idehen <kide...@openlinksw.com> wrote:
>
> On 10/20/14 5:49 AM, Ankit Shah wrote:
>> Hello,
>> I am a new user of virtuoso and have installed virtuoso 7. I am trying to
>> use the virtuoso sponger to convert non-rdf data like csv files and
>> wikipedia html pages into RDF. So far, I have installed the sponger packages
>> using the "Packages" tab from the virtuoso conductor. All the mappers like
>> CSV , Wikipedia URLs Amazon URLS are registered and enabled.
>>
>> I am assuming that the query
>>
>> SELECT * FROM <http://en.wikipedia.org/wiki/Paul_McCartney> WHERE {?s ?p ?o};
>>
>> convert the HTML page into RDF and list all the tuples. But the query
>> returns 0 tuples.
>>
>> Similarly attempts to convert CSV into RDF using the query
>>
>> SELECT * FROM
>> <http://samplecsvs.s3.amazonaws.com/TechCrunchcontinentalUSA.csv> WHERE {?s
>> ?p ?o};
>>
>> returns no results.
>>
>> Am I missing out something? Please help me out.
>
> There are many options for converting CSV into RDF. If using the sponger,
> following installation of the "cartridges_dav.vad" package, you would execute;
>
>
> define get:soft "replace"
> SELECT * FROM
> <http://samplecsvs.s3.amazonaws.com/TechCrunchcontinentalUSA.csv
> <http://samplecsvs.s3.amazonaws.com/TechCrunchcontinentalUSA.csv>> WHERE {?s
> ?p ?o};
>
> The query above includes a pragma (engine instruction) that invokes the
> sponger middleware layer, as part of the SPARQL query solution (result set)
> processing pipeline. Net effect,
> <http://samplecsvs.s3.amazonaws.com/TechCrunchcontinentalUSA.csv
> <http://samplecsvs.s3.amazonaws.com/TechCrunchcontinentalUSA.csv>> is
> de-referenced and the document it identifies is imported in a local named
> graph (internal document identifier) of the same name (identifier).
>
>
> Links:
>
> 1. http://linkeddata.uriburner.com/c/9P625JY
> <http://linkeddata.uriburner.com/c/9P625JY> -- Query Result
> 2. http://linkeddata.uriburner.com/c/9CKP65GT
> <http://linkeddata.uriburner.com/c/9CKP65GT> -- Query Definition
>
> --
> Regards,
>
> Kingsley Idehen
> Founder & CEO
> OpenLink Software
> Company Web: http://www.openlinksw.com <http://www.openlinksw.com/>
> Personal Weblog 1: http://kidehen.blogspot.com <http://kidehen.blogspot.com/>
> Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen
> <http://www.openlinksw.com/blog/~kidehen>
> Twitter Profile: https://twitter.com/kidehen <https://twitter.com/kidehen>
> Google+ Profile: https://plus.google.com/+KingsleyIdehen/about
> <https://plus.google.com/+KingsleyIdehen/about>
> LinkedIn Profile: http://www.linkedin.com/in/kidehen
> <http://www.linkedin.com/in/kidehen>
> Personal WebID: http://kingsley.idehen.net/dataspace/person/kidehen#this
> <http://kingsley.idehen.net/dataspace/person/kidehen#this>
>
>
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