Re: [Virtuoso-users] Virtuoso LDP

Kingsley Idehen Tue, 09 Dec 2014 09:37:22 -0800

On 12/9/14 10:30 AM, Erich Bremer wrote:

Hi Kingsley,


I've updated to the latest dev version and put a test RDF file (my public
WebID profile which is in RDF/XML) in my DAV folder.  I can retrieve it, but
it only gives me RDF/XML even though I ask for JSON-LD.   I looked in your
Public folder and only have a ttl version of your profile2.ttl, yet, I can
get JSON-LD from your server.  Am I missing something here?


No, there stuff missing from the VOS archive, clearly.

Also, can Virtuoso's LDP give one access to the RDF in the Quad store
itself, rather than the DAV folders?

Yes, remember you can also map a folder to the quad store such that all resources in the folder are replicated in the quad store. You can also use SPARQL Update via LDP.


Rough example dump, from one of my QA exercises, in July:

SPARQL 1.1 INSERT using HTTP PATCH method

curl -E MyCertificate-ODS-QA.pem:1234 -X PATCH -k -i --data-binary "INSERT {GRAPH <urn:rww:demo:data> {<http://kingsley.idehen.net/dataspace/person/kidehen#this> a <http://xmlns.com/foaf/0.1/Person> . } }" -H "Content-Type: application/sparql-update; utf-8" https://ods-qa.openlinksw.com/DAV/home/kidehen/Public/example2.ttl


HTTP/1.1 204 No Content
Server: Virtuoso/07.10.3211 (Linux) x86_64-redhat-linux-gnu-LDP  VDB
Connection: Keep-Alive
Date: Fri, 04 Jul 2014 17:18:16 GMT
Accept-Ranges: bytes

X-SPARQL-default-graph: http://ods-qa.openlinksw.com/DAV/home/kidehen/Public/example2.ttl

Content-Type: application/sparql-results+xml; charset=UTF-8
Content-Length: 444

SPARQL SELECT -- using HTTP POST method

curl -E MyCertificate-ODS-QA.pem:1234 -X POST -ik --data-binary "select * from <urn:rww:demo:data> where {?s ?p ?o}" -H "Content-Type: application/sparql-query" "https://ods-qa.openlinksw.com/sparql";


HTTP/1.1 200 OK
Server: Virtuoso/07.10.3211 (Linux) x86_64-redhat-linux-gnu-LDP  VDB
Connection: Keep-Alive
Date: Fri, 04 Jul 2014 17:31:38 GMT
Accept-Ranges: bytes
X-SPARQL-default-graph: http://ods-qa.openlinksw.com/DAV/VAD/val/sparql/
Content-Type: application/sparql-results+xml; charset=UTF-8
Content-Length: 792

 <head>
  <variable name="s"/>
  <variable name="p"/>
  <variable name="o"/>
 </head>
 <results distinct="false" ordered="true">
  <result>

<binding name="s"><uri>http://kingsley.idehen.net/dataspace/person/kidehen#this</uri></binding> <binding name="p"><uri>http://www.w3.org/1999/02/22-rdf-syntax-ns#type</uri></binding>

   <binding name="o"><uri>http://xmlns.com/foaf/0.1/Person</uri></binding>
  </result>
  <result>
   <binding name="s"><uri>#this</uri></binding>
   <binding name="p"><uri>#relation</uri></binding>
   <binding name="o"><uri>#that</uri></binding>
  </result>
 </results>


    - Erich


I've brought this to everyone's attention, internally.

--
Regards,

Kingsley Idehen 
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog 1: http://kidehen.blogspot.com
Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen
Twitter Profile: https://twitter.com/kidehen
Google+ Profile: https://plus.google.com/+KingsleyIdehen/about
LinkedIn Profile: http://www.linkedin.com/in/kidehen
Personal WebID: http://kingsley.idehen.net/dataspace/person/kidehen#this

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