A key requirement is that I have to put the URI "
http://www.w3.org/1999/02/22-rdf-syntax-ns#type"; into the label field for
the Edge (Tinkerpop-Sail for SPARQL support seems to want this).
I'm trying to port from a Neo4J implementation where this was not an issue.
OrientDB seems to have problems when it encounters special characters in
the Label.
Would explicitly specifying a class solve this? Could I use the generic E
class? Or do I need to escape the special characters somehow?
Tim
On Friday, January 9, 2015 at 4:22:48 PM UTC-5, Curtis Mosters wrote:
>
> Hi, what you need is something like that
>
> person1.addEdge("class:Friend", person2, null, null, "since", "2013-07-30"
> );
>
> look here:
> https://github.com/orientechnologies/orientdb/wiki/Graph-Database-Tinkerpop
> Am Freitag, 9. Januar 2015 01:27:35 UTC+1 schrieb Tim Kingsbury:
>>
>>
>> Hello,
>>
>> I am attempting to add some RDF nodes to an empty OrientDB 2.0-RC1
>> database through the Blueprints interface. Unfortunately, I'm running into
>> problems with adding edges with labels that are URIs. Here's some code that
>> demonstrates my problem:
>>
>> Vertex luca = graph.addVertex(null);
>> luca.setProperty("name", "Luca");
>>
>> Vertex marko = graph.addVertex(null);
>> marko.setProperty("name", "Marko");
>>
>> graph.addEdge(null, luca, marko, "knows");
>> graph.addEdge(null, luca, marko, "
>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type";);
>> graph.commit();
>>
>> Iterable<Edge> edges = luca.getEdges(Direction.BOTH);
>> for (Edge e : edges)
>> {
>> System.out.println("Found edge: " + e.getLabel());
>> }
>>
>>
>> When the edges are printed, only the "knows" edge is displayed. The URI
>> edge is not retrieved.
>>
>> In WebStudio, if I "select * from V", the vertexes appear, but only the
>> "knows" edge is displayed in the in/out lists.
>> Surprisingly, if I "select * from E", both the URI and the "knows" edge
>> are listed.
>>
>> Is there a special trick for adding an edge with a URI label? I assume
>> that the colons, periods, and slashes are tripping things up.
>>
>> Any help would be greatly appreciated!
>>
>>
>> Tim
>>
>
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