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---+ Virtuoso SPARQL 1.1 Graph Store HTTP Protocol Support

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---++What?
An application protocol for the distributing, updating and fetching of RDF graph content in a Graph Store via the mechanics of the [[http://www.w3.org/TR/sparql11-http-rdf-update/#rfc3987][Hypertext Transfer Protocol (HTTP)]] 

---++Why?
Simplifies use of HTTP operations on RDF graphs which are managed outside of a SPARQL 1.1 graph store.

---++How?
   
Virtuoso supports <code>/sparql-graph-crud/</code> Web Service Endpoint that implements the current draft of [[http://www.w3.org/TR/sparql11-http-rdf-update/][W3C SPARQL Graph Update protocol]]. Both <code>/sparql</code> and <code>/sparql-graph-crud/</code> endpoints use the same SPARQL user account, so this user should be a member of <nowiki>SPARQL_UPDATE</nowiki> group in order to modify data via Graph Update protocol. 

Note that <code>/sparql/</code> endpoint has <code>/sparql-auth/</code> variant that uses web authentication. Similarly, <code>/sparql-graph-crud/</code> has <code>/sparql-graph-crud-auth/</code> variant. As soon as user is member of <nowiki>SPARQL_UPDATE</nowiki> group, he/she then can modify the stored data via <code>/sparql-graph-crud-auth/</code> as well as via <code>/sparql-auth/</code> .

---+++Usage Examples

   * [[VirtGraphUpdateProtocolUI][Using sparql-graph-crud and sparql-graph-crud-auth Web Service Endpoints UI]] 
   * [[VirtGraphProtocolCURLExamples][cURL examples]]


---++Related 

   * [[http://www.w3.org/TR/sparql11-http-rdf-update/][SPARQL 1.1 Graph Store HTTP Protocol]]
   * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html#sparqloauthendpointauth][Virtuoso SPARQL Authentication]]