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-rw-r--r--src/RDFWriter.cpp15
1 files changed, 14 insertions, 1 deletions
diff --git a/src/RDFWriter.cpp b/src/RDFWriter.cpp
index b23f51a..625d1fc 100644
--- a/src/RDFWriter.cpp
+++ b/src/RDFWriter.cpp
@@ -15,6 +15,7 @@
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <sstream>
#include "raul/RDFWriter.h"
#include "raul/AtomRaptor.h"
@@ -30,7 +31,8 @@ static const char* const RDF_LANG = "turtle";
RDFWriter::RDFWriter()
: _serializer(NULL)
, _string_output(NULL)
-{
+ , _next_blank_id(0)
+{
add_prefix("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
//add_prefix("rdfs", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
}
@@ -40,6 +42,9 @@ void
RDFWriter::add_prefix(const string& prefix, const string& uri)
{
_prefixes[prefix] = uri;
+ if (_serializer)
+ raptor_serialize_set_namespace(_serializer,
+ raptor_new_uri(U(uri.c_str())), U(prefix.c_str()));
}
@@ -68,6 +73,14 @@ RDFWriter::expand_uri(const string& uri)
}
+RdfId
+RDFWriter::blank_id()
+{
+ std::ostringstream ss;
+ ss << "n" << _next_blank_id++;
+ return RdfId(RdfId::ANONYMOUS, ss.str());
+}
+
/** Begin a serialization to a file.
*