diff --git a/geoportal-common/pom.xml b/geoportal-common/pom.xml
index e47ea6f..404e742 100644
--- a/geoportal-common/pom.xml
+++ b/geoportal-common/pom.xml
@@ -111,24 +111,4 @@
 
 	</dependencies>
 
-
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-source-plugin</artifactId>
-				<version>${plugin.source.version}</version>
-				<executions>
-					<execution>
-						<id>jar-no-fork</id>
-						<phase>install</phase>
-						<goals>
-							<goal>jar</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-		</plugins>
-	</build>
-
 </project>
\ No newline at end of file
diff --git a/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/configuration/Index.java b/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/configuration/Index.java
index cef5592..66030a1 100644
--- a/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/configuration/Index.java
+++ b/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/configuration/Index.java
@@ -4,6 +4,12 @@ import com.fasterxml.jackson.annotation.JsonIgnore;
 import org.bson.Document;
 
 public class Index extends Document {
+
+    public static class KnownTypes{
+        public static final String GIS_CENTROIDS="GIS_CENTROIDS";
+    }
+
+
     public static final String TYPE = "_type";
 
     @JsonIgnore