--- a/OrthancServer/DatabaseWrapper.cpp	Wed May 15 15:57:05 2013 +0200
+++ b/OrthancServer/DatabaseWrapper.cpp	Wed May 15 16:28:00 2013 +0200
@@ -360,6 +360,23 @@
     }
   }
 
+  bool DatabaseWrapper::ListAvailableMetadata(std::list<MetadataType>& target,
+                                              int64_t id)
+  {
+    target.clear();
+
+    SQLite::Statement s(db_, SQLITE_FROM_HERE, "SELECT type FROM Metadata WHERE id=?");
+    s.BindInt(0, id);
+
+    while (s.Step())
+    {
+      target.push_back(static_cast<MetadataType>(s.ColumnInt(0)));
+    }
+
+    return true;
+  }
+
+
   std::string DatabaseWrapper::GetMetadata(int64_t id,
                                            MetadataType type,
                                            const std::string& defaultValue)