iSPARQL REST Mode Support Virtuoso iSPARQL endpoint can be accessed via REST using http://host:port/isparql/view/ (e.g., OpenLink's Virtuoso Demo site iSPARQL endpoint, http://demo.openlinksw.com/isparql), with the following parameters: format: specifies the request format (set by default to "application/rdf+xml"). defaultGraph: used as FROM, if not specified in query query: the SPARQL query named-graph-uri: used for named graphs, can be specified multiple times maxrows: specifies limit on the results sponge: specifies sponger cache behavior endpoint: specifies sparql endpoint file: .isparql, .ldr, and .rq resources Example 1 Get 10 triples from demo Dataspace: SELECT * FROM <http://demo.openlinksw.com/dataspace> WHERE {?s ?p ?o} LIMIT 10 Load this URL in your browser: http://demo.openlinksw.com/isparql/view/?query=SELECT%20*%20%0AFROM%20%3Chttp%3A%2F%2Fdemo.openlinksw.com%2Fdataspace%3E%0AWHERE%20%7B%3Fs%20%3Fp%20%3Fo%7D%0ALIMIT%2010&endpoint=/sparql&maxrows=50&default-graph-uri= As a result, the triples found will be shown:

Example 2 Get 10 Weblog posts: prefix sioc: <http://rdfs.org/sioc/ns#> prefix sioct: <http://rdfs.org/sioc/types#> prefix dct: <http://purl.org/dc/elements/1.1/> prefix dcc: <http://purl.org/dc/terms/> SELECT DISTINCT ?forum_name, ?post, ?title ?cr ?url FROM <http://demo.openlinksw.com/dataspace> WHERE { ?forum a sioct:Weblog . ?forum sioc:id ?forum_name . ?forum sioc:container_of ?post . OPTIONAL { ?post dct:title ?title } . OPTIONAL { ?post dcc:created ?cr } . OPTIONAL { ?post sioc:link ?url } . } ORDER BY DESC (?cr) LIMIT 10 Load this URL in your browser: http://demo.openlinksw.com/isparql/view/?query=prefix%20sioc%3A%20%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%20%0Aprefix%20sioct%3A%20%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Ftypes%23%3E%0Aprefix%20dct%3A%20%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Felements%2F1.1%2F%3E%0Aprefix%20dcc%3A%20%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3E%20%0ASELECT%20DISTINCT%20%3Fforum_name%20%3Fpost%20%3Ftitle%20%3Fcr%20%3Furl%20%0AFROM%20%3Chttp%3A%2F%2Fdemo.openlinksw.com%2Fdataspace%3E%0AWHERE%20%20%20%20%0A%20%20%7B%20%0A%20%20%20%20%3Fforum%20a%20sioct%3AWeblog%20.%0A%20%20%20%20%3Fforum%20sioc%3Aid%20%3Fforum_name%20.%0A%20%20%20%20%3Fforum%20sioc%3Acontainer_of%20%3Fpost%20.%0A%20%20%20%20OPTIONAL%20%7B%20%3Fpost%20dct%3Atitle%20%3Ftitle%20%7D%20.%0A%20%20%20%20OPTIONAL%20%7B%20%3Fpost%20dcc%3Acreated%20%3Fcr%20%7D%20.%0A%20%20%20%20OPTIONAL%20%7B%20%3Fpost%20sioc%3Alink%20%3Furl%20%7D%20.%0A%20%20%7D%0AORDER%20BY%20DESC%20(%3Fcr)%0ALIMIT%2010&endpoint=/sparql&maxrows=50&default-graph-uri= As a result, the triples found will be shown:

See Also iSPARQL Overview Basic iSPARQL Tutorial with query built from a blank canvas and pre-typed Nodes Basic iSPARQL Tutorial with query built from a blank canvas and Nodes dragged from the Toolbar Basic iSPARQL Tutorial iSPARQL Querying Tutorial with SPARQL Query type "CONSTRUCT" iSPARQL Querying Tutorial with SPARQL Query type "DESCRIBE" iSPARQL Querying Tutorial with SPARQL Query type "INSERT" iSPARQL Querying Tutorial with SPARQL Query type "DELETE" iSPARQL Querying Tutorial with SPARQL Query type "SELECT" CategorySPARQL CategoryRDF CategoryOpenSource CategoryOAT CategoryDocumentation CategoryWebSite