diff --git a/src/main/java/org/gcube/informationsystem/contexts/reference/entities/Context.java b/src/main/java/org/gcube/informationsystem/contexts/reference/entities/Context.java
index a348904..f2900fa 100644
--- a/src/main/java/org/gcube/informationsystem/contexts/reference/entities/Context.java
+++ b/src/main/java/org/gcube/informationsystem/contexts/reference/entities/Context.java
@@ -44,7 +44,52 @@ public interface Context extends EntityElement, SchemaMixedElement {
 	public static final String NAME_PROPERTY = "name";
 	public static final String PARENT_PROPERTY = "parent";
 	public static final String CHILDREN_PROPERTY = "children";
-
+	
+	/**
+	 * {
+	 * 	...
+	 * 	"availableAt" : [
+	 * 		"https://i-marine.d4science.org/group/alienandinvasivespecies", 
+	 * 		"https://services.d4science.org/group/alienandinvasivespecies"
+	 * 	]
+	 * 	...
+	 * }
+	 * For non VRE context this field could be null or could have multiple value
+	 * For VRE it is normally one value only (but some exception could exists
+	 */
+	public static final String AVAILABLE_AT_PROPERTY = "availableAt";
+	
+	// 
+	/**
+	 * This information is provided to allowed user only (by role)
+	 * {
+	 * 	...
+	 * 	"fullpaths" : [
+	 * 		{
+	 * 			"fullpath": "/gcube/devsec/myTest",
+	 * 			"time": "2023-12-11 15:35:41.289 +0000", // Same of creationTime in metadata
+	 * 		},
+	 * 		{
+	 * 			"fullpath": "/gcube/devsec/myTestVRE",
+	 * 			"time": "2023-12-13 16:13:12.336 +0000",
+	 * 		}
+	 * 		{
+	 * 			"fullpath": "/gcube/devsec/myVRE",
+	 * 			"time": "2023-12-18 12:37:48.172 +0000", // Same of lastUpdateTime
+	 * 		}
+	 * 	]
+	 * 	...
+	 * }
+	 */
+	public static final String CONTEXT_FULLPATH_CHANGES_LOG_PROPERTY = "fullpaths";
+	
+	/**
+	 * This information is provided to allowed user only (by role)
+	 * The symmetric key for the context
+	 */
+	public static final String CONTEXT_KEY_PROPERTY = "key";
+	
+	
 	@ISProperty(name = NAME_PROPERTY, mandatory = true, nullable = false)
 	public String getName();