[Developers] RDF Service

[Rodolfo Stecher]

Dear all,
I am trying to access from Java the RDF service

So, I e.g. create a URL:

URL rdfURL = new URL("http://rdf.freebase.com/rdf/type.lang");
URLConnection rdfConn = rdfURL.openConnection ();			

//setting the type of results I want to receive as specified in:
http://rdf.freebase.com/
rdfConn.addRequestProperty("Accept", "RDF/XML");

InputStreamReader rdfiSR = new InputStreamReader(rdfConn.getInputStream());

Then I get, regardless of the value (N3, RDF/XML or Turtle) of the Accept
parameter, the following exception:

Server returned HTTP response code: 500 for URL:
http://rdf.freebase.com/rdf/type.lang

When I remove the specification of the Accept parameter, then I get the
response in readable format, e.g.:

@prefix fb: http://rdf.freebase.com/ns/.@prefix rdf:
http://www.w3.org/1999/02/22-rdf-syntax-ns#.@prefix rdfs:
http://www.w3.org/2000/01/rdf-schema#.@prefix xml:
http://www.w3.org/XML/1998/namespace. <http://rdf.freebase.com/ns/type.lang>
a <http://rdf.freebase.com/ns/type.type>;
<http://rdf.freebase.com/ns/freebase.documented_object.documentation>
<http://rdf.freebase.com/ns/guid.9202a8c04000641f80000000042b11e2>;
<http://rdf.freebase.com/ns/freebase.documented_object.tip> "the type of
which all languages are instances";
<http://rdf.freebase.com/ns/type.object.key> [
<http://rdf.freebase.com/ns/type.key.namespace> fb:type;
<http://rdf.freebase.com/ns/type.value.value> "lang"];
<http://rdf.freebase.com/ns/type.object.name> "Language";
<http://rdf.freebase.com/ns/type.object.permission>
<http://rdf.freebase.com/ns/boot.root_permission>;
<http://rdf.freebase.com/ns/type.type.default_property> "id";
<http://rdf.freebase.com/ns/type.type.domain> fb:type;
<http://rdf.freebase.com/ns/type.type.expected_by> .....


So, I guess I am specifying wrongly the HTTP "Accept" parameter, or that
this option is not working properly, could you please help me out?

Thanks a lot,
Rodolfo