diff --git a/src/main.vala b/src/main.vala
index 25e83b1..5d5e9b9 100644
--- a/src/main.vala
+++ b/src/main.vala
@@ -34,12 +34,44 @@ public class PluginDataExample : PluginData {
 	 * Any abstract method realization for PluginData.
 	 */
 	public override string get_readable_name () {
-		//stdout.puts ("PluginDataExample.get_readable_name () called\n");
-		//stdout.puts ("Call IHostCore.get_cache_dir () from PluginDataExample:\n  ");
-		//var cache_dir = (host as IHostCore).get_cache_dir ();
-		//stdout.printf ("cache_dir = %s\n", cache_dir);
 		return _("Data Example");
 	}
+
+	/**
+	 * transfer string data
+	 */
+	public string get_string_data (string id) {
+		switch (id) {
+			case "SampleRequest": return "Sample Answer";
+			case "AnotherRequest": return "Another Answer";
+			case "Manual.SampleRequest": return "Manual Sample Answer";
+			case "MainChart":
+				var cache_dir = (host as IHostCore).get_cache_dir ();
+				// TODO: save picture in path: cache_dir + "MainChart.png";
+
+				return "MainChart";
+		}
+		return "";
+	}
+
+	/**
+	 * transfer array1D data
+	 */
+	public string[] get_array1d_data (string id) {
+		return { "A1d", "B1d", "C1d", "D1d", "E1d" };
+	}
+
+	/**
+	 * transfer array1D data
+	 */
+	public string[,] get_array2d_data (string id) {
+		return { { "A2d", "B2d", "C2d", "D2d", "E2d"},
+		         { "F2d", "G2d", "H2d", "I2d", "J2d"},
+		         { "K2d", "L2d", "M2d", "N2d", "O2d"},
+		         { "P2d", "Q2d", "R2d", "S2d", "T2d"},
+		         { "U2d", "V2d", "W2d", "X2d", "Y2d"},
+		       };
+	}
 }
 
 [ModuleInit]