diff --git a/.settings/.gitignore b/.settings/.gitignore
new file mode 100644
index 0000000..57d3934
--- /dev/null
+++ b/.settings/.gitignore
@@ -0,0 +1,2 @@
+/org.eclipse.jdt.core.prefs
+/org.eclipse.core.resources.prefs
diff --git a/src/main/java/org/gcube/informationsystem/model/reference/entities/Resource.java b/src/main/java/org/gcube/informationsystem/model/reference/entities/Resource.java
index 4180a0e..8226a87 100644
--- a/src/main/java/org/gcube/informationsystem/model/reference/entities/Resource.java
+++ b/src/main/java/org/gcube/informationsystem/model/reference/entities/Resource.java
@@ -11,6 +11,7 @@ import org.gcube.informationsystem.model.reference.relations.IsRelatedTo;
 import org.gcube.informationsystem.types.annotations.Abstract;
 import org.gcube.informationsystem.types.annotations.ResourceSchema;
 import org.gcube.informationsystem.types.annotations.ResourceSchemaEntry;
+import org.gcube.informationsystem.types.annotations.ResourceSchemaRelatedEntry;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@@ -25,6 +26,9 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 @ResourceSchema(
 	facets={
 		@ResourceSchemaEntry(relation=ConsistsOf.class, facet=Facet.class, min=1, description="Any Resource consists of one or more Facets which describes the different aspects of the resource."),
+	},
+	resources= {
+		@ResourceSchemaRelatedEntry(source=Resource.class, relation=IsRelatedTo.class, target=Resource.class, description="Any Resource can be related to any other resource.")
 	}
 )
 public interface Resource extends Entity {
diff --git a/src/main/java/org/gcube/informationsystem/types/annotations/ResourceSchema.java b/src/main/java/org/gcube/informationsystem/types/annotations/ResourceSchema.java
index 2ad0af1..5b1b7d8 100644
--- a/src/main/java/org/gcube/informationsystem/types/annotations/ResourceSchema.java
+++ b/src/main/java/org/gcube/informationsystem/types/annotations/ResourceSchema.java
@@ -13,5 +13,6 @@ import java.lang.annotation.Target;
 public @interface ResourceSchema {
 
 	ResourceSchemaEntry[] facets() default {};
-
+	
+	ResourceSchemaRelatedEntry[] resources() default {};
 }
diff --git a/src/main/java/org/gcube/informationsystem/types/annotations/ResourceSchemaRelatedEntry.java b/src/main/java/org/gcube/informationsystem/types/annotations/ResourceSchemaRelatedEntry.java
new file mode 100644
index 0000000..568a824
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/types/annotations/ResourceSchemaRelatedEntry.java
@@ -0,0 +1,46 @@
+package org.gcube.informationsystem.types.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.gcube.informationsystem.model.reference.entities.Entity;
+import org.gcube.informationsystem.model.reference.entities.Resource;
+import org.gcube.informationsystem.model.reference.relations.IsRelatedTo;
+import org.gcube.informationsystem.types.TypeBinder;
+import org.gcube.informationsystem.types.reference.properties.PropertyDefinition;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ * It is used by {@link TypeBinder} to identify which getter method are
+ * related to and {@link Entity} {@link PropertyDefinition}.
+ * The name of the property is obtained by removing "get" or "is" from method 
+ * name and lower casing the first letter.
+ */
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ResourceSchemaRelatedEntry {
+
+	@JsonProperty
+	Class<? extends Resource> source() default Resource.class;
+	
+	@SuppressWarnings("rawtypes")
+	@JsonProperty
+	Class<? extends IsRelatedTo> relation() default IsRelatedTo.class;
+	
+	@JsonProperty
+	Class<? extends Resource> target() default Resource.class;
+	
+	@JsonProperty
+	String description() default "";
+	
+	@JsonProperty
+	int min() default 0;
+	
+	@JsonProperty
+	int max() default -1;
+	
+}
\ No newline at end of file
diff --git a/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java
index f39e86d..207b9fc 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java
@@ -19,6 +19,7 @@ import org.gcube.informationsystem.types.annotations.Abstract;
 import org.gcube.informationsystem.types.annotations.ISProperty;
 import org.gcube.informationsystem.types.annotations.ResourceSchema;
 import org.gcube.informationsystem.types.annotations.ResourceSchemaEntry;
+import org.gcube.informationsystem.types.annotations.ResourceSchemaRelatedEntry;
 import org.gcube.informationsystem.types.impl.entities.EntityTypeDefinitionImpl;
 import org.gcube.informationsystem.types.impl.properties.PropertyDefinitionImpl;
 import org.gcube.informationsystem.types.impl.properties.PropertyTypeDefinitionImpl;
@@ -53,6 +54,7 @@ public class TypeDefinitionImpl extends ERImpl implements TypeDefinition {
 	protected Set<String> superClasses;
 	protected Set<PropertyDefinition> properties;
 	protected List<ResourceEntryDefinition> facets;
+	protected List<ResourceEntryDefinition> resources;
 	
 	protected static <ISM extends ISManageable> Set<String> retrieveSuperClasses(Class<? extends ISM> type, Class<ISM> baseClass, String topSuperClass){
 		Set<String> interfaceList = new HashSet<>();
@@ -159,6 +161,7 @@ public class TypeDefinitionImpl extends ERImpl implements TypeDefinition {
 	private void setResourceSchemaEntries(Class<? extends Resource> clz){
 		if(clz.isAnnotationPresent(ResourceSchema.class)) {
 			this.facets = new ArrayList<>();
+			this.resources = new ArrayList<>();
 			ResourceSchema[] resourceSchemaArray = clz.getAnnotationsByType(ResourceSchema.class);
 			for(ResourceSchemaEntry resourceSchemaEntry : resourceSchemaArray[0].facets()) {
 				ResourceEntryDefinitionImpl resourceSchemaEntryDefinition = new ResourceEntryDefinitionImpl();
@@ -170,6 +173,16 @@ public class TypeDefinitionImpl extends ERImpl implements TypeDefinition {
 				resourceSchemaEntryDefinition.setMax(resourceSchemaEntry.max());
 				this.facets.add(resourceSchemaEntryDefinition);
 			}
+			for(ResourceSchemaRelatedEntry resourceSchemaRelatedEntry : resourceSchemaArray[0].resources()) {
+				ResourceEntryDefinition resourceSchemaEntryDefinition = new ResourceEntryDefinitionImpl();
+				resourceSchemaEntryDefinition.setSource(TypeBinder.getType(resourceSchemaRelatedEntry.source()));
+				resourceSchemaEntryDefinition.setRelation(TypeBinder.getType(resourceSchemaRelatedEntry.relation()));
+				resourceSchemaEntryDefinition.setTarget(TypeBinder.getType(resourceSchemaRelatedEntry.target()));
+				resourceSchemaEntryDefinition.setDescription(resourceSchemaRelatedEntry.description());
+				resourceSchemaEntryDefinition.setMin(resourceSchemaRelatedEntry.min());
+				resourceSchemaEntryDefinition.setMax(resourceSchemaRelatedEntry.max());
+				this.resources.add(resourceSchemaEntryDefinition);
+			}
 		}
 	}
 	
@@ -202,4 +215,8 @@ public class TypeDefinitionImpl extends ERImpl implements TypeDefinition {
 		return facets;
 	}
 	
+	public List<ResourceEntryDefinition> getResources() {
+		return resources;
+	}
+	
 }