Fuseki config: use location 'DB' instead of '--mem--' (fixes disappearing triples after restart)

examples/oml/SystemDesignOntology2Layers/.fuseki.ttl

@@ -17,7 +17,7 @@
 
 # In memory TDB with union graph.
 <#dataset> rdf:type tdb:DatasetTDB ;
-    tdb:location "--mem--" ;
+    tdb:location "DB" ;
     # Query timeout on this dataset (1s, 1000 milliseconds)
     ja:context [ ja:cxtName "arq:queryTimeout" ; ja:cxtValue "1000" ] ;
     # Make the default graph be the union of all named graphs.