diff --git a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/dataset/resources/TagsPanel.ui.xml b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/dataset/resources/TagsPanel.ui.xml
index 8201f14..1574742 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/dataset/resources/TagsPanel.ui.xml
+++ b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/dataset/resources/TagsPanel.ui.xml
@@ -9,6 +9,7 @@
 	<g:HTMLPanel>
 		<b:ControlGroup ui:field="tagsInsertGroup">
 			<b:ControlLabel for="tags" title="Product tags">
+				<font color="red">*</font>
 				Tags:
 			</b:ControlLabel>
 			<b:Controls>
diff --git a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/utils/InfoIconsLabels.java b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/utils/InfoIconsLabels.java
index c47e3c6..4af8a11 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/utils/InfoIconsLabels.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/client/ui/utils/InfoIconsLabels.java
@@ -28,7 +28,8 @@ public class InfoIconsLabels {
 	public static final String TAGS_INFO_TEXT = "Tags are meaningful information that can be associated to the "
 			+ "item and by means of them it can be retrieved. A tag can contain only alphanumeric characters. "
 			+ "If the tag is composed by a single word it must have a size of at least two characters."
-			+ "Examples of good tags: \"This is a sample tag\", \"tagY\". Example of bad tag: \"c\".";
+			+ "Examples of good tags: \"This is a sample tag\", \"tagY\". Example of bad tag: \"c\"."
+			+ " You must push ENTER for attaching a tag.";
 
 	// LICENSES
 	public static final String LICENSES_INFO_ID_POPUP = "licenses-popup-panel-info";
diff --git a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DataType.java b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DataType.java
index 25e5289..32060d9 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DataType.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DataType.java
@@ -1,10 +1,8 @@
 package org.gcube.portlets.widgets.ckandatapublisherwidget.shared;
 
 /**
- * The Enum DataType.
- *
- * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
- * Sep 12, 2016
+ * Data type.
+ * @author Costantino Perciante at ISTI-CNR (costantino.perciante@isti.cnr.it)
  */
 public enum DataType {
 
diff --git a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java
index e5423ce..73b3830 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java
@@ -30,7 +30,7 @@ public class DatasetMetadataBean implements Serializable {
 	private List<OrganizationBean> organizationList; // list of organization in which the user is present and could create the dataset
 	private ResourceElementBean resourceRoot; // in case of workspace, this is the directory root or the single file information
 	private List<MetaDataProfileBean> metadataList;
-	private List<String> tags; // on retrieve, they are the keys of the custom fields
+	private List<String> tags; // on retrieve, they are the keys of the product
 	private Map<String, List<String>> customFields;
 	private List<GroupBean> groups;