diff --git a/src/main/java/org/gcube/informationsystem/types/impl/TypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/TypeImpl.java
index 593b32c..d96e152 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/TypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/TypeImpl.java
@@ -9,6 +9,7 @@ import java.util.Map;
 import java.util.Set;
 
 import org.gcube.com.fasterxml.jackson.annotation.JsonGetter;
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonInclude;
 import org.gcube.com.fasterxml.jackson.annotation.JsonInclude.Include;
 import org.gcube.com.fasterxml.jackson.annotation.JsonProperty;
@@ -263,6 +264,7 @@ public class TypeImpl implements Type {
 	}
 	
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		return null;
 	}
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/entities/EntityTypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/entities/EntityTypeImpl.java
index 3b35f7b..3d8feac 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/entities/EntityTypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/entities/EntityTypeImpl.java
@@ -2,6 +2,7 @@ package org.gcube.informationsystem.types.impl.entities;
 
 import java.io.StringWriter;
 
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonTypeName;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.base.reference.entities.EntityElement;
@@ -102,6 +103,7 @@ public class EntityTypeImpl extends TypeImpl implements EntityType {
 	}
 	
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		
 		if(name.compareTo(Context.NAME)==0) {
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/entities/FacetTypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/entities/FacetTypeImpl.java
index 5e47188..360d2e4 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/entities/FacetTypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/entities/FacetTypeImpl.java
@@ -2,6 +2,7 @@ package org.gcube.informationsystem.types.impl.entities;
 
 import java.util.Set;
 
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonTypeName;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.model.reference.entities.Entity;
@@ -38,6 +39,7 @@ public class FacetTypeImpl extends EntityTypeImpl implements FacetType {
 	}
 
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		return AccessType.FACET;
 	}
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/entities/ResourceTypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/entities/ResourceTypeImpl.java
index 3dd48db..ede5a5a 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/entities/ResourceTypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/entities/ResourceTypeImpl.java
@@ -3,6 +3,7 @@ package org.gcube.informationsystem.types.impl.entities;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonTypeName;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.model.reference.entities.Entity;
@@ -84,6 +85,7 @@ public class ResourceTypeImpl extends EntityTypeImpl implements ResourceType {
 	}
 	
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		return AccessType.RESOURCE;
 	}
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/properties/PropertyTypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/properties/PropertyTypeImpl.java
index c9bf64a..7f233ad 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/properties/PropertyTypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/properties/PropertyTypeImpl.java
@@ -2,6 +2,7 @@ package org.gcube.informationsystem.types.impl.properties;
 
 import java.util.Set;
 
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonTypeName;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.base.reference.properties.PropertyElement;
@@ -43,6 +44,7 @@ public final class PropertyTypeImpl<P extends PropertyElement> extends TypeImpl
 	}
 	
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		
 		if(name.compareTo(PropertyType.NAME)==0) {
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/relations/ConsistsOfTypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/relations/ConsistsOfTypeImpl.java
index 0c1dc07..c1cd24b 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/relations/ConsistsOfTypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/relations/ConsistsOfTypeImpl.java
@@ -2,6 +2,7 @@ package org.gcube.informationsystem.types.impl.relations;
 
 import java.lang.reflect.Type;
 
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonTypeName;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.model.reference.entities.Facet;
@@ -59,6 +60,7 @@ public class ConsistsOfTypeImpl extends RelationTypeImpl<ResourceType, FacetType
 	}
 	
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		return AccessType.CONSISTS_OF;
 	}
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/relations/IsRelatedToTypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/relations/IsRelatedToTypeImpl.java
index c4c82a1..c9414f6 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/relations/IsRelatedToTypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/relations/IsRelatedToTypeImpl.java
@@ -2,6 +2,7 @@ package org.gcube.informationsystem.types.impl.relations;
 
 import java.lang.reflect.Type;
 
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonTypeName;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.model.reference.entities.Resource;
@@ -56,6 +57,7 @@ public class IsRelatedToTypeImpl extends RelationTypeImpl<ResourceType, Resource
 	}
 	
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		return AccessType.IS_RELATED_TO;
 	}
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/relations/RelationTypeImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/relations/RelationTypeImpl.java
index b066d61..0834365 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/relations/RelationTypeImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/relations/RelationTypeImpl.java
@@ -3,6 +3,7 @@ package org.gcube.informationsystem.types.impl.relations;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 
+import org.gcube.com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gcube.com.fasterxml.jackson.annotation.JsonTypeName;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.base.reference.entities.EntityElement;
@@ -136,6 +137,7 @@ public class RelationTypeImpl<S extends EntityType, T extends EntityType>
 	}
 	
 	@Override
+	@JsonIgnore
 	public AccessType getAccessType() {
 		
 		if(name.compareTo(IsParentOf.NAME)==0) {
diff --git a/src/main/java/org/gcube/informationsystem/types/reference/Type.java b/src/main/java/org/gcube/informationsystem/types/reference/Type.java
index b5d9ab9..ddca48f 100644
--- a/src/main/java/org/gcube/informationsystem/types/reference/Type.java
+++ b/src/main/java/org/gcube/informationsystem/types/reference/Type.java
@@ -54,6 +54,7 @@ public interface Type extends IdentifiableElement {
 	
 	public Set<PropertyDefinition> getProperties();
 
+	@JsonIgnore
 	public AccessType getAccessType();
 	
 }
diff --git a/src/main/java/org/gcube/informationsystem/types/reference/entities/EntityType.java b/src/main/java/org/gcube/informationsystem/types/reference/entities/EntityType.java
index d87cfe8..af6dfd7 100644
--- a/src/main/java/org/gcube/informationsystem/types/reference/entities/EntityType.java
+++ b/src/main/java/org/gcube/informationsystem/types/reference/entities/EntityType.java
@@ -4,7 +4,6 @@ import java.util.Set;
 
 import org.gcube.com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import org.gcube.com.fasterxml.jackson.databind.annotation.JsonDeserialize;
-import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.base.reference.entities.EntityElement;
 import org.gcube.informationsystem.types.annotations.ISProperty;
 import org.gcube.informationsystem.types.impl.entities.EntityTypeImpl;
@@ -44,6 +43,4 @@ public interface EntityType extends Type, EntityElement {
 
 	/* {@link Type} is just a Java useful class. The type is not created in the IS. Hence the fields must be redefined */
 	
-	public AccessType getAccessType();
-	
 }