diff --git a/src/main/java/org/gcube/datacatalogue/metadatadiscovery/bean/jaxb/MetadataTagging.java b/src/main/java/org/gcube/datacatalogue/metadatadiscovery/bean/jaxb/MetadataTagging.java
index 88b9625..b6e78a1 100644
--- a/src/main/java/org/gcube/datacatalogue/metadatadiscovery/bean/jaxb/MetadataTagging.java
+++ b/src/main/java/org/gcube/datacatalogue/metadatadiscovery/bean/jaxb/MetadataTagging.java
@@ -26,7 +26,7 @@ import org.gcube.datacatalogue.metadatadiscovery.adapter.TaggingGroupingAdapter;
 public class MetadataTagging implements Serializable{
 
 
-	public static final String DEFAULT_SEPARATOR = ":";
+	public static final String DEFAULT_SEPARATOR = "-";
 
 	/**
 	 *