diff --git a/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/Util.java b/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/Util.java
index 90afe45..e365e55 100644
--- a/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/Util.java
+++ b/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/Util.java
@@ -72,6 +72,10 @@ public class Util {
 			return null;
 		if (item.isFolder())
 			return GWTIconsManager.getIconFolder(item.isSharedFolder());
+		if (item.getType() == ItemType.EXTERNAL_URL)
+			return GWTIconsManager.getIconTypeLink();
+		if (item.getType() == ItemType.XML)
+			return GWTIconsManager.getXMLTypeLink();
 		return GWTIconsManager.getIconFile(item.getName());
 	}
 
diff --git a/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/ItemBuilder.java b/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/ItemBuilder.java
index b69d8f7..d51fa31 100644
--- a/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/ItemBuilder.java
+++ b/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/ItemBuilder.java
@@ -13,6 +13,7 @@ import java.util.Map.Entry;
 import org.gcube.common.storagehub.client.plugins.AbstractPlugin;
 import org.gcube.common.storagehub.client.proxies.ItemManagerClient;
 import org.gcube.common.storagehub.model.items.AbstractFileItem;
+import org.gcube.common.storagehub.model.items.ExternalURL;
 import org.gcube.common.storagehub.model.items.FolderItem;
 import org.gcube.common.storagehub.model.items.Item;
 import org.gcube.common.storagehub.model.items.SharedFolder;
@@ -195,7 +196,7 @@ public class ItemBuilder {
 		else if (item instanceof FolderItem) {
 			return getFolderItemType(item);
 		}
-		_log.warn("\n\n\n**** Item Type non found: ");
+		_log.warn("Item Type non found: " + item.toString());
 		return ItemType.UNKNOWN_TYPE;
 
 	}
@@ -205,6 +206,12 @@ public class ItemBuilder {
 	 * @return the item type based on the extension of the file
 	 */
 	private static ItemType getFileIconImageType(Item item) {
+		if (item instanceof ExternalURL)
+			return ItemType.EXTERNAL_URL;
+		AbstractFileItem aItem = (AbstractFileItem) item;
+		if (aItem.getContent().getMimeType().compareTo("application/xml") == 0) {
+			return ItemType.XML;
+		}
 		String[] splits =  item.getName().split("\\.");
 		String extension = "";
 		if (splits.length > 0) {
@@ -344,7 +351,6 @@ public class ItemBuilder {
 		if (allowedFileExtension==null || allowedFileExtension.size()==0) {
 			return true;
 		}
-
 		try {
 			if (! (item instanceof FolderItem)) {
 				String name = item.getName();
diff --git a/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/WorkspaceExplorerServiceImpl.java b/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/WorkspaceExplorerServiceImpl.java
index 52ccaf4..014cdfb 100644
--- a/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/WorkspaceExplorerServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/WorkspaceExplorerServiceImpl.java
@@ -322,32 +322,20 @@ public class WorkspaceExplorerServiceImpl extends RemoteServiceServlet implement
 	 */
 	@Override
 	public Long getSizeByItemId(String itemId) throws Exception {
-		//TODO: implementation missing
-		return 0L;
-		//		logger.info("get Size By ItemId "+ itemId);
-		//		try {
-		//
-		//			Workspace workspace = getWorkspace();
-		//			WorkspaceItem wsItem = workspace.getItem(itemId);
-		//			Long size = new Long(-1);
-		//
-		//			if(wsItem instanceof FolderItem){ //ITEM
-		//				FolderItem folderItem = (FolderItem) wsItem;
-		//				size = new Long(folderItem.getLength());
-		//			} else if (wsItem instanceof WorkspaceFolder ){ //FOLDER
-		//				WorkspaceFolder theFolder = (WorkspaceFolder) wsItem;
-		//				size = theFolder.getSize();
-		//			} else if (wsItem instanceof WorkspaceSharedFolder){ //SHARED FOLDER
-		//				WorkspaceSharedFolder theFolder = (WorkspaceSharedFolder) wsItem;
-		//				size = theFolder.getSize();
-		//			}
-		//			logger.info("returning size: " +size);
-		//			return size;
-		//
-		//		} catch (Exception e) {
-		//			logger.error("get Size By ItemId ", e);
-		//			throw new Exception(e.getMessage());
-		//		}
+		_log.debug("get Size By ItemId "+ itemId);
+		try {
+			Item wsItem = Whorespace.getItem(getThreadLocalRequest(), itemId);
+			_log.trace("workspace retrieve item name: "+wsItem.getName());
+			if((wsItem instanceof FolderItem)) //if is a folder no mime
+				return null;
+
+			AbstractFileItem file = (AbstractFileItem) wsItem;
+			return file.getContent().getSize();
+
+		} catch (Exception e) {
+			_log.error("get MimeType By ItemId ", e);
+			throw new Exception(e.getMessage());
+		}
 	}
 
 	/* (non-Javadoc)
diff --git a/src/main/java/org/gcube/portlets/widgets/wsexplorer/shared/ItemType.java b/src/main/java/org/gcube/portlets/widgets/wsexplorer/shared/ItemType.java
index c0a9219..9e140f0 100644
--- a/src/main/java/org/gcube/portlets/widgets/wsexplorer/shared/ItemType.java
+++ b/src/main/java/org/gcube/portlets/widgets/wsexplorer/shared/ItemType.java
@@ -8,7 +8,6 @@ package org.gcube.portlets.widgets.wsexplorer.shared;
  * The Enum ItemType.
  *
  * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
- * Jun 18, 2015
  */
 public enum ItemType {
 	PRIVATE_FOLDER,
@@ -28,6 +27,7 @@ public enum ItemType {
 	ZIP,
 	RAR,
 	HTML,
+	XML,
 	TEXT_PLAIN,
 	DOCUMENT,
 	PRESENTATION,