diff --git a/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/ConfigurationTemplate.java b/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/ConfigurationTemplate.java
index e2648a3..c82543c 100644
--- a/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/ConfigurationTemplate.java
+++ b/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/ConfigurationTemplate.java
@@ -4,15 +4,14 @@
 package org.gcube.resourcemanagement.model.reference.entities.resources;
 
 import org.gcube.com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import org.gcube.informationsystem.types.annotations.RelatedResourcesEntry;
 import org.gcube.informationsystem.types.annotations.ResourceSchema;
 import org.gcube.informationsystem.types.annotations.ResourceSchemaEntry;
-import org.gcube.informationsystem.types.annotations.RelatedResourcesEntry;
 import org.gcube.informationsystem.types.reference.Change;
 import org.gcube.informationsystem.types.reference.TypeMetadata;
 import org.gcube.informationsystem.utils.TypeVersion;
 import org.gcube.resourcemanagement.model.impl.entities.resources.ConfigurationTemplateImpl;
 import org.gcube.resourcemanagement.model.reference.entities.facets.IdentifierFacet;
-import org.gcube.resourcemanagement.model.reference.entities.facets.SimplePropertyFacet;
 import org.gcube.resourcemanagement.model.reference.relations.consistsof.IsIdentifiedBy;
 import org.gcube.resourcemanagement.model.reference.relations.isrelatedto.IsConfiguredBy;
 import org.gcube.resourcemanagement.model.reference.relations.isrelatedto.IsCustomizedBy;
@@ -30,8 +29,7 @@ import org.gcube.resourcemanagement.model.reference.relations.isrelatedto.IsDeri
 @JsonDeserialize(as=ConfigurationTemplateImpl.class)
 @ResourceSchema(
 	facets={
-			@ResourceSchemaEntry(relation=IsIdentifiedBy.class, facet=IdentifierFacet.class, min=1),
-			@ResourceSchemaEntry(facet=SimplePropertyFacet.class, min=1)
+			@ResourceSchemaEntry(relation=IsIdentifiedBy.class, facet=IdentifierFacet.class, min=1)
 	},
 	resources = {
 			@RelatedResourcesEntry(source=Configuration.class, relation=IsDerivationOf.class, target=ConfigurationTemplate.class),
diff --git a/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/GCubeResource.java b/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/GCubeResource.java
index 2f5072a..ce7ab65 100644
--- a/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/GCubeResource.java
+++ b/src/main/java/org/gcube/resourcemanagement/model/reference/entities/resources/GCubeResource.java
@@ -24,7 +24,7 @@ import org.gcube.resourcemanagement.model.reference.relations.consistsof.IsIdent
 @JsonDeserialize(as=GCubeResourceImpl.class)
 @ResourceSchema(
 	facets={
-		@ResourceSchemaEntry(relation=IsIdentifiedBy.class, min=1, description=" Any Resource has at least one Facet which in some way allow to identify the Resource per se.")
+		@ResourceSchemaEntry(relation=IsIdentifiedBy.class, min=1, max=1, description=" Any Resource has at least one Facet which in some way allow to identify the Resource per se.")
 	}
 )
 @TypeMetadata(