diff --git a/src/main/java/org/gcube/datatransfer/resolver/gis/GisResolver.java b/src/main/java/org/gcube/datatransfer/resolver/gis/GisResolver.java
index b22232a..ee18bad 100644
--- a/src/main/java/org/gcube/datatransfer/resolver/gis/GisResolver.java
+++ b/src/main/java/org/gcube/datatransfer/resolver/gis/GisResolver.java
@@ -59,8 +59,8 @@ public class GisResolver extends HttpServlet{
 	/** The logger. */
 	private static final Logger logger = LoggerFactory.getLogger(GisResolver.class);
 	
-	protected Map<String, ServerParameters> cachedServerParams; //A cache scope - geonetwork parameters
-	protected Map<String, String> cachedGisViewerApplHostname; //A cache scope -  GisViewerApp hostname
+	protected Map<String, ServerParameters> cachedServerParams; //A cache: scope - geonetwork parameters
+	protected Map<String, String> cachedGisViewerApplHostname; //A cache: scope -  GisViewerApp hostname
 
 	private Timer timer;
 	private GisViewerAppGenericResourcePropertyReader gisViewerAppPropertyReader;