--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/common/IResultType.java	Thu Apr 12 19:15:42 2018 +0200
@@ -0,0 +1,24 @@
+/** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
+ * Software engineering by
+ *  Björnsen Beratende Ingenieure GmbH
+ *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
+ *
+ * This file is Free Software under the GNU AGPL (>=v3)
+ * and comes with ABSOLUTELY NO WARRANTY! Check out the
+ * documentation coming with Dive4Elements River for details.
+ */
+package org.dive4elements.river.artifacts.common;
+
+import java.io.Serializable;
+
+import org.dive4elements.artifacts.CallContext;
+
+/**
+ * @author Domenico Nardi Tironi
+ */
+public interface IResultType extends Serializable {
+
+    String exportValue(final CallContext context, final Object value);
+
+    double asDouble(final Object value);
+}
\ No newline at end of file