--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/core/rdf_models.py	Sat Jun 15 01:33:28 2013 +0200
@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+'''
+Created on Jun 11, 2013
+
+@author: ymh
+'''
+
+from rdflib import plugin, ConjunctiveGraph, URIRef, Literal
+from rdflib.store import Store
+from django.db import connections
+
+class TermGraph(ConjunctiveGraph):
+    
+    def __init__(self, do_open=False, create=False):
+        identifier = "jocondelab"        
+        store = plugin.get("SQLAlchemy", Store)(identifier=identifier)
+        ConjunctiveGraph.__init__(self, store=store, identifier=identifier)
+        if do_open:
+            self.open(create)
+
+    def open(self, create=False):
+        db_settings = connections['default'].settings_dict
+        sa_db_settings = {
+            'engine': 'postgresql+psycopg2' if db_settings['ENGINE'] == "django.db.backends.postgresql_psycopg2" else db_settings['ENGINE'],
+            'user': db_settings['USER'],
+            'password': db_settings['PASSWORD'],
+            'port': db_settings['PORT'] if db_settings['PORT'] else "5432",
+            'host': db_settings['HOST'] if db_settings['HOST'] else "localhost",
+            'name': db_settings['NAME']             
+        } 
+        connect_config = "%(engine)s://%(user)s:%(password)s@%(host)s:%(port)s/%(name)s"%sa_db_settings 
+
+        return ConjunctiveGraph.open(self, connect_config, create=create)
+
+    def get_uri_for_term(self, term, context):
+        c = URIRef(context)
+        tl = Literal(term)
+        
+        for s,p,_ in self.triples((None, None, tl), context=c):
+            if p in [URIRef("http://www.w3.org/2004/02/skos/core#prefLabel"), URIRef("http://www.w3.org/2004/02/skos/core#alternateLabel")]:
+                return unicode(s)
+        return None
+
+graph = TermGraph(do_open=True, create=False)
\ No newline at end of file