diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP11_curates_volatile_digital_object.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP11_curates_volatile_digital_object.java
new file mode 100644
index 0000000..2941441
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP11_curates_volatile_digital_object.java
@@ -0,0 +1,6 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+
+public interface PP11_curates_volatile_digital_object extends PP32_curates {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP11i_was_volatile_digital_object_curated_by.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP11i_was_volatile_digital_object_curated_by.java
new file mode 100644
index 0000000..18eaa2c
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP11i_was_volatile_digital_object_curated_by.java
@@ -0,0 +1,10 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP11i_was_volatile_digital_object_curated_by extends
+		PP32i_is_curated_by {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP12_curates_volatile_software.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP12_curates_volatile_software.java
new file mode 100644
index 0000000..b79e7b3
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP12_curates_volatile_software.java
@@ -0,0 +1,9 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP12_curates_volatile_software extends PP11_curates_volatile_digital_object {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP12i_was_volatile_software_curated_by.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP12i_was_volatile_software_curated_by.java
new file mode 100644
index 0000000..0d99468
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP12i_was_volatile_software_curated_by.java
@@ -0,0 +1,10 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP12i_was_volatile_software_curated_by extends
+		PP11i_was_volatile_digital_object_curated_by {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP13_curates_volatile_dataset.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP13_curates_volatile_dataset.java
new file mode 100644
index 0000000..55eac64
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP13_curates_volatile_dataset.java
@@ -0,0 +1,10 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP13_curates_volatile_dataset extends
+		PP11_curates_volatile_digital_object {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP13i_was_volatile_dataset_curated_by.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP13i_was_volatile_dataset_curated_by.java
new file mode 100644
index 0000000..1f47713
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP13i_was_volatile_dataset_curated_by.java
@@ -0,0 +1,10 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP13i_was_volatile_dataset_curated_by extends
+		PP11i_was_volatile_digital_object_curated_by {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP2_provided_by.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP2_provided_by.java
new file mode 100644
index 0000000..dad991d
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP2_provided_by.java
@@ -0,0 +1,9 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP2_provided_by extends P14_carried_out_by {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP32_curates.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP32_curates.java
new file mode 100644
index 0000000..a589aa7
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP32_curates.java
@@ -0,0 +1,8 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP32_curates {
+
+}
diff --git a/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP32i_is_curated_by.java b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP32i_is_curated_by.java
new file mode 100644
index 0000000..656c27f
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/parthenos/model/relation/PP32i_is_curated_by.java
@@ -0,0 +1,8 @@
+package org.gcube.informationsystem.parthenos.model.relation;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface PP32i_is_curated_by {
+
+}