Changes between Version 6 and Version 7 of proposals/DCATandRDFServices

Timestamp:

May 31, 2012, 8:23:50 AM (12 years ago)

Author:

fxp

Comment:

--

proposals/DCATandRDFServices

@@ -467 +467 @@
 }}}
 
-== Example of use of RDF outputs ==
+== Using RDF outputs ==
 
 === Visualization tools ===
@@ -481 +481 @@
 [[Image(rdf-visual-ex-by-inspire-themes.png)]]
 
+=== SPARQL queries ===
+
+Once loaded in a SPARQL endpoint, the catalogue content could be queried using SPARQL:
+
+ * Get metadata titles
+{{{
+sparql select ?title where {?s <http://purl.org/dc/elements/1.1/title> ?title};
+}}} 
+
+ * Get metadata about transport network
+{{{
+sparql 
+PREFIX  dc: <http://purl.org/dc/elements/1.1/>
+PREFIX  dcat: <http://www.w3.org/ns/dcat#>
+PREFIX  skos: <http://www.w3.org/2004/02/skos/core#>
+SELECT  ?title, ?label
+WHERE   { ?x dc:title ?title .
+          ?x dcat:theme ?theme .
+          ?theme skos:prefLabel ?label
+          FILTER(?label = "Transport network")
+        };
+}}}
 
 == Risks ==