diff --git a/src/main/java/org/gcube/informationsystem/exporter/mapper/GCoreResourceMapper.java b/src/main/java/org/gcube/informationsystem/exporter/mapper/GCoreResourceMapper.java
index 5981d39..63be63c 100644
--- a/src/main/java/org/gcube/informationsystem/exporter/mapper/GCoreResourceMapper.java
+++ b/src/main/java/org/gcube/informationsystem/exporter/mapper/GCoreResourceMapper.java
@@ -19,7 +19,7 @@ import org.gcube.common.authorization.library.AuthorizationEntry;
 import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
 import org.gcube.common.resources.gcore.Resources;
 import org.gcube.common.scope.api.ScopeProvider;
-import org.gcube.informationsystem.base.reference.ISConstants;
+import org.gcube.informationsystem.base.reference.Element;
 import org.gcube.informationsystem.exporter.mapper.exception.CreateException;
 import org.gcube.informationsystem.exporter.mapper.exception.UpdateException;
 import org.gcube.informationsystem.model.reference.entities.Facet;
@@ -93,7 +93,7 @@ public abstract class GCoreResourceMapper<GR extends org.gcube.common.resources.
 
 	public static String getDateString(Calendar calendar) {
 		Date date = calendar.getTime();
-		SimpleDateFormat format = new SimpleDateFormat(ISConstants.DATETIME_PATTERN);
+		SimpleDateFormat format = new SimpleDateFormat(Element.DATETIME_PATTERN);
 		return format.format(date);
 	}