diff --git a/.classpath b/.classpath
index 4214a97..7b8885c 100644
--- a/.classpath
+++ b/.classpath
@@ -22,5 +22,6 @@
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
 	<classpathentry kind="output" path="target/classes"/>
 </classpath>
diff --git a/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/custom_annotations/Group.java b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/custom_annotations/Group.java
new file mode 100644
index 0000000..9686d53
--- /dev/null
+++ b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/custom_annotations/Group.java
@@ -0,0 +1,16 @@
+package org.gcube.data_catalogue.grsf_publish_ws.custom_annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Group annotation
+ * @author Costantino Perciante at ISTI-CNR (costantino.perciante@isti.cnr.it)
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.FIELD)
+public @interface Group {
+
+}
diff --git a/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/custom_annotations/Tag.java b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/custom_annotations/Tag.java
new file mode 100644
index 0000000..b78346c
--- /dev/null
+++ b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/custom_annotations/Tag.java
@@ -0,0 +1,16 @@
+package org.gcube.data_catalogue.grsf_publish_ws.custom_annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Tag annotation
+ * @author Costantino Perciante at ISTI-CNR (costantino.perciante@isti.cnr.it)
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.FIELD)
+public @interface Tag {
+	
+}
diff --git a/src/test/java/org/gcube/data_catalogue/grsf_publish_ws/JTests.java b/src/test/java/org/gcube/data_catalogue/grsf_publish_ws/JTests.java
new file mode 100644
index 0000000..8db3819
--- /dev/null
+++ b/src/test/java/org/gcube/data_catalogue/grsf_publish_ws/JTests.java
@@ -0,0 +1,45 @@
+package org.gcube.data_catalogue.grsf_publish_ws;
+
+import java.beans.IntrospectionException;
+import java.beans.PropertyDescriptor;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+
+import org.gcube.data_catalogue.grsf_publish_ws.custom_annotations.Group;
+import org.gcube.data_catalogue.grsf_publish_ws.custom_annotations.Tag;
+import org.gcube.data_catalogue.grsf_publish_ws.json.FisheryRecord;
+import org.gcube.data_catalogue.grsf_publish_ws.utils.groups.Source;
+import org.gcube.data_catalogue.grsf_publish_ws.utils.groups.Type;
+import org.junit.Test;
+
+public class JTests {
+
+	@Test
+	public void test() throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, IntrospectionException {
+
+		//		Common instance = new Common();
+		//		instance.setType(Type.Assesment_Unit);
+		FisheryRecord recordFishery = new FisheryRecord();
+		recordFishery.setType(Type.Fishing_Description);
+		recordFishery.setDatabaseSources(Source.FIRMS);
+		//		Class<Common> commonClass = Common.class;
+		Class<FisheryRecord> fisheryClass = FisheryRecord.class;
+
+		// bottom up, looks up for Tag fields
+		Class<?> current = fisheryClass;
+		do{
+			// do something with current's fields
+			System.out.println("Class is " + current.getCanonicalName());
+			Field[] fields = current.getDeclaredFields();
+			for (Field field : fields) {
+				if(field.isAnnotationPresent(Tag.class) || field.isAnnotationPresent(Group.class)){
+					System.out.println("Annotated field is " + field.getName());
+					Object f = new PropertyDescriptor(field.getName(), fisheryClass).getReadMethod().invoke(recordFishery);
+					System.out.println("Field is " + field.getName() + " and its value for instance is " + f);
+				}
+			}
+		}
+		while((current = current.getSuperclass())!=null);
+	}
+
+}