diff --git a/mc_openapi/assets/doml_meta_v2.2.1.yaml b/mc_openapi/assets/doml_meta_v2.2.1.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..b30e3273d81c4f15e6acab16883d400a1e2ddbc6
--- /dev/null
+++ b/mc_openapi/assets/doml_meta_v2.2.1.yaml
@@ -0,0 +1,552 @@
+commons:
+    DOMLElement:
+        attributes:
+            name:
+                type: String
+                multiplicity: "0..1"
+            description:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            annotations:
+                class: commons_Property
+                multiplicity: "0..*"
+    Property:
+        attributes:
+            key:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            reference:
+                class: commons_DOMLElement
+                multiplicity: "0..1"
+    IProperty:
+        superclass: commons_Property
+        attributes:
+            value:
+                type: Integer
+                multiplicity: "0..1"
+    SProperty:
+        superclass: commons_Property
+        attributes:
+            value:
+                type: String
+                multiplicity: "0..1"
+    FProperty:
+        superclass: commons_Property
+        attributes:
+            value:
+                type: String
+                multiplicity: "0..1"
+    BProperty:
+        superclass: commons_Property
+        attributes:
+            value:
+                type: Boolean
+                multiplicity: "0..1"
+    Configuration:
+        superclass: commons_DOMLElement
+        associations:
+            deployments:
+                class: commons_Deployment
+                multiplicity: "0..*"
+    Credentials:
+        abstract: true
+        superclass: commons_DOMLElement
+    DeployableElement:
+        abstract: true
+        superclass: commons_DOMLElement # It's not present in the ECore, but without it breaks.
+    Deployment:
+        associations:
+            component:
+                class: commons_DeployableElement
+                multiplicity: "1"
+            node:
+                class: infrastructure_InfrastructureElement
+                multiplicity: "1"
+    KeyPair:
+        superclass: commons_Credentials
+        attributes:
+            user:
+                type: String
+                multiplicity: "0..1"
+            keyfile:
+                type: String
+                multiplicity: "0..1"
+            algorithm:
+                type: String
+                multiplicity: "0..1"
+            bits:
+                type: Integer
+                multiplicity: "0..1"
+    UserPass:
+        superclass: commons_Credentials
+        attributes:
+            username:
+                type: String
+                multiplicity: "0..1"
+            password:
+                type: String
+                multiplicity: "0..1"
+    Source:
+        superclass: commons_DOMLElement
+        attributes:
+            entry:
+                type: String
+                multiplicity: "0..*"
+            backend:
+                type: String
+                multiplicity: "0..*"
+application:
+    ApplicationLayer:
+        superclass: commons_DOMLElement
+        associations:
+            components:
+                class: application_ApplicationComponent
+                multiplicity: "0..*"
+    ApplicationComponent:
+        superclass: commons_DeployableElement # and commons_DOMLElement too, but that's definitely wrong; keeping discarding DOMLElement since DeplElem inherits it.
+    SoftwareComponent:
+        superclass: application_ApplicationComponent
+        attributes:
+            isPersistent:
+                type: Boolean
+                multiplicity: "1"
+                default: false
+            licenseCost:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            exposedInterfaces:
+                class: application_SoftwareInterface
+                multiplicity: "0..*"
+            consumedInterfaces:
+                class: application_SoftwareInterface
+                multiplicity: "0..*"
+            src:
+                class: commons_Source
+                multiplicity: "0..1"
+    SaaS:
+        superclass: application_ApplicationComponent
+        attributes:
+            licenseCost:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            exposedInterfaces:
+                class: application_SoftwareInterface
+                multiplicity: "0..*"
+    SoftwareInterface:
+        superclass: application_ApplicationComponent
+        attributes:
+            endPoint:
+                type: String
+                multiplicity: "0..1"
+    DBMS:
+        superclass: application_SoftwareComponent
+    SaaSDBMS:
+        superclass: application_SaaS
+
+infrastructure:
+    InfrastructureLayer:
+        superclass: commons_DOMLElement
+        associations:
+            nodes:
+                class: infrastructure_ComputingNode
+                multiplicity: "0..*"
+            generators:
+                class: infrastructure_ComputingNodeGenerator
+                multiplicity: "0..*"
+            storages:
+                class: infrastructure_Storage
+                multiplicity: "0..*"
+            faas:
+                class: infrastructure_FunctionAsAService
+                multiplicity: "0..*"
+            credentials:
+                class: commons_Credentials
+                multiplicity: "0..*"
+            groups:
+                class: infrastructure_ComputingGroup
+                multiplicity: "0..*"
+            securityGroups:
+                class: infrastructure_SecurityGroup
+                multiplicity: "0..*"
+            networks:
+                class: infrastructure_Network
+                multiplicity: "0..*"
+            rules:
+                class: infrastructure_MonitoringRule
+                multiplicity: "0..*"
+    MonitoringRule:
+        superclass: commons_DOMLElement
+        attributes:
+            condition:
+                type: String 
+                multiplicity: "1"
+            strategy:
+                type: String 
+                multiplicity: "1"
+            strategyConfigurationString:
+                type: String 
+                multiplicity: "0..1"
+    InfrastructureElement:
+        superclass: commons_DeployableElement
+    ComputingNode:
+        superclass: infrastructure_InfrastructureElement
+        attributes:
+            architecture: 
+                type: String 
+                multiplicity: "0..1"
+            os: 
+                type: String 
+                multiplicity: "0..1"
+            memory_mb:
+                type: Integer 
+                multiplicity: "0..1"
+            memory_kb:  # Missing in official Ecore, added by parser
+                type: Integer 
+                multiplicity: "0..1"
+            storage: 
+                type: String 
+                multiplicity: "0..1"
+            cpu_count: 
+                type: Integer 
+                multiplicity: "0..1"
+            cost: 
+                type: Integer  # in cents 
+                multiplicity: "0..1"
+            disabledMonitorings:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            ifaces:
+                class: infrastructure_NetworkInterface
+                multiplicity: "0..*"
+            location:
+                class: infrastructure_Location
+                multiplicity: "0..1"
+            credentials:
+                class: commons_Credentials
+                multiplicity: "0..1"
+            group:
+                class: infrastructure_ComputingGroup
+                multiplicity: "0..1"
+                inverse_of: infrastructure_ComputingGroup::groupedNodes
+    PhysicalComputingNode:
+        superclass: infrastructure_ComputingNode
+    VirtualMachine:
+        superclass: infrastructure_ComputingNode
+        attributes:
+            sizeDescription:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            generatedFrom:
+                class: infrastructure_VMImage
+                multiplicity: "0..1"
+    Location:
+        superclass: commons_DOMLElement
+        attributes:
+            region:
+                type: String
+                multiplicity: "0..1"
+            zone:
+                type: String
+                multiplicity: "0..1"
+    ContainerConfig:
+        superclass: commons_DOMLElement
+        attributes:
+            container_port:
+                type: Integer
+                multiplicity: "0..1"
+            vm_port:
+                type: Integer
+                multiplicity: "0..1"
+        associations:
+            host:
+                class: infrastructure_ComputingNode
+                multiplicity: "0..1"
+            iface:
+                class: infrastructure_NetworkInterface
+                multiplicity: "0..1"
+    Container:
+        superclass: infrastructure_ComputingNode
+        associations:
+            generatedFrom:
+                class: infrastructure_ContainerImage
+                multiplicity: "0..1"
+            configs:
+                class: infrastructure_ContainerConfig
+                multiplicity: "0..*"
+    ComputingNodeGenerator:
+        superclass: commons_DOMLElement
+        attributes:
+            uri:
+                type: String
+                multiplicity: "0..1"
+            kind:
+                type: GeneratorKind  # enum { SCRIPT, IMAGE }
+    VMImage:
+        superclass: infrastructure_ComputingNodeGenerator
+        associations:
+            generatedVMs:
+                class: infrastructure_VirtualMachine
+                multiplicity: "0..*"
+                inverse_of: infrastructure_VirtualMachine::generatedFrom
+    ContainerImage:
+        superclass: infrastructure_ComputingNodeGenerator
+        associations:
+            generatedContainers:
+                class: infrastructure_Container
+                multiplicity: "0..*"
+                inverse_of: infrastructure_Container::generatedFrom
+    AutoScalingGroup:
+        superclass: infrastructure_ComputingGroup
+        attributes:
+            min:
+                type: Integer
+                multiplicity: "0..1"
+            max:
+                type: Integer
+                multiplicity: "0..1"
+            loadBalancer:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            machineDefinition:
+                class: infrastructure_VirtualMachine
+                multiplicity: "1"
+            securityGroup:
+                class: infrastructure_SecurityGroup
+                multiplicity: "0..1"
+    Storage:
+        superclass: infrastructure_InfrastructureElement
+        attributes:
+            label:
+                type: String
+                multiplicity: "0..1"
+            size_gb:
+                type: Integer  # in GBs
+                multiplicity: "0..1"
+            cost: 
+                type: Integer  # in cents 
+                multiplicity: "0..1"
+        associations:
+            ifaces:
+                class: infrastructure_NetworkInterface
+                multiplicity: "0..*"
+    FunctionAsAService:
+        superclass: infrastructure_InfrastructureElement
+        attributes:
+            cost:
+                type: Integer  # in cents
+                multiplicity: "0..1"
+        associations:
+            ifaces:
+                class: infrastructure_NetworkInterface
+                multiplicity: "0..*"
+    Network:
+        superclass: commons_DOMLElement
+        attributes:
+            protocol:
+                type: String
+                multiplicity: "0..1"
+            addressRange:
+                type: String
+                multiplicity: "0..1"
+            cidr:
+                type: Integer
+                multiplicity: "0..1"
+        associations:
+            connectedIfaces:
+                class: infrastructure_NetworkInterface
+                multiplicity: "0..*"
+                inverse_of: infrastructure_NetworkInterface::belongsTo
+            gateways:
+                class: infrastructure_InternetGateway
+                multiplicity: "0..*"
+            subnets:
+                class: infrastructure_Subnet
+                multiplicity: "0..*"
+    Subnet:
+        superclass: infrastructure_Network
+        associations:
+            connectedTo:
+                class: infrastructure_Network
+                multiplicity: "0..*"
+    NetworkInterface:
+        superclass: infrastructure_InfrastructureElement
+        attributes:
+            endPoint:
+                type: Integer
+                multiplicity: "0..1"
+            speed:
+                type: String
+                multiplicity: "0..1"
+        associations:
+            belongsTo:
+                class: infrastructure_Network
+                multiplicity: "0..1" # This should be "1", but it would break InternetGateway
+            associated:
+                class: infrastructure_SecurityGroup
+                multiplicity: "0..1" # TODO: try putting this to 1 and see why it fails
+    InternetGateway:
+        superclass: infrastructure_NetworkInterface
+        attributes:
+            address:
+                type: String
+                multiplicity: "1"
+    ComputingGroup:
+        superclass: commons_DOMLElement
+        associations:
+            groupedNodes:
+                class: infrastructure_ComputingNode
+                multiplicity: "0..*"
+                inverse_of: infrastructure_ComputingNode::group
+    SecurityGroup:
+        superclass: commons_DOMLElement
+        associations:
+            rules:
+                class: infrastructure_Rule
+                multiplicity: "0..*"
+            ifaces:
+                class: infrastructure_NetworkInterface
+                multiplicity: "0..*"
+                inverse_of: infrastructure_NetworkInterface::associated
+    Rule:
+        superclass: commons_DOMLElement
+        attributes:
+            kind:
+                type: String
+                multiplicity: "1"
+            protocol:
+                type: String
+                multiplicity: "1"
+            fromPort:
+                type: Integer
+                multiplicity: "1"
+            toPort:
+                type: Integer
+                multiplicity: "1"
+            cidr:
+                type: String
+                multiplicity: "0..*"
+    SwarmRole:
+        superclass: commons_DOMLElement
+        attributes:
+            kind:
+                type: String
+                multiplicity: "1"
+        associations:
+            nodes:
+                class: infrastructure_ComputingNode
+                multiplicity: "0..*"
+    Swarm:
+        superclass: infrastructure_ComputingGroup
+        associations:
+            roles:
+                class: infrastructure_SwarmRole
+                multiplicity: "0..*"
+    ExtInfrastructureElement:
+        superclass: infrastructure_InfrastructureElement
+
+concrete:
+    ConcreteInfrastructure:
+        superclass: commons_DOMLElement
+        associations:
+            providers:
+                class: concrete_RuntimeProvider
+                multiplicity: "0..*"
+    ConcreteElement:
+        superclass: commons_DOMLElement
+        associations:
+            refs:
+                class: concrete_ConcreteElement
+                multiplicity: "0..*"
+        attributes:
+            configurationScript:
+                type: String
+                multiplicity: "0..1"
+            preexisting:
+                multiplicity: "1"
+                type: Boolean
+                default: false
+    RuntimeProvider:
+        superclass: commons_DOMLElement
+        associations:
+            resources:
+                class: concrete_GenericResource
+                multiplicity: "0..*"
+            vms:
+                class: concrete_VirtualMachine
+                multiplicity: "0..*"
+            vmImages:
+                class: concrete_VMImage
+                multiplicity: "0..*"
+            containerImages:
+                class: concrete_ContainerImage
+                multiplicity: "0..*"
+            networks:
+                class: concrete_Network
+                multiplicity: "0..*"
+            storages:
+                class: concrete_Storage
+                multiplicity: "0..*"
+            faas:
+                class: concrete_FunctionAsAService
+                multiplicity: "0..*"
+            group:
+                class: concrete_ComputingGroup
+                multiplicity: "0..*"
+    VirtualMachine:
+        superclass: concrete_ConcreteElement
+        associations:
+            maps:
+                class: infrastructure_VirtualMachine
+                multiplicity: "0..1"
+    VMImage:
+        superclass: concrete_ConcreteElement
+        associations:
+            maps:
+                class: infrastructure_VMImage
+                multiplicity: "0..1"
+    ContainerImage:
+        superclass: concrete_ConcreteElement
+        associations:
+            maps:
+                class: infrastructure_ContainerImage
+                multiplicity: "0..1"
+    Network:
+        superclass: concrete_ConcreteElement
+        associations:
+            maps:
+                class: infrastructure_Network
+                multiplicity: "0..1"
+    Storage:
+        superclass: concrete_ConcreteElement
+        associations:
+            maps:
+                class: infrastructure_Storage
+                multiplicity: "0..1"
+    FunctionAsAService:
+        superclass: concrete_ConcreteElement
+        associations:
+            maps:
+                class: infrastructure_FunctionAsAService
+                multiplicity: "0..1"
+    ComputingGroup:
+        superclass: concrete_ConcreteElement
+        associations:
+            maps:
+                class: infrastructure_ComputingGroup
+                multiplicity: "1"
+    GenericResource:
+        superclass: concrete_ConcreteElement
+        attributes:
+            type:
+                type: "String"
+                multiplicity: "1"
+            gname:
+                type: "String"
+                multiplicity: "1"
diff --git a/mc_openapi/assets/doml_meta_v2.2.yaml b/mc_openapi/assets/doml_meta_v2.2.yaml
index bbdf849b090c95ce447a5814f5ea9e5cd02b3713..0867657750bd7ed3027fe3e44ca306169dd27efb 100644
--- a/mc_openapi/assets/doml_meta_v2.2.yaml
+++ b/mc_openapi/assets/doml_meta_v2.2.yaml
@@ -82,7 +82,7 @@ commons:
     UserPass:
         superclass: commons_Credentials
         attributes:
-            user:
+            username:
                 type: String
                 multiplicity: "0..1"
             password:
diff --git a/mc_openapi/assets/doml_v2.2.1.ecore b/mc_openapi/assets/doml_v2.2.1.ecore
new file mode 100644
index 0000000000000000000000000000000000000000..cbff3c686bae8d319a1d8c6a272d16b18cc65034
--- /dev/null
+++ b/mc_openapi/assets/doml_v2.2.1.ecore
@@ -0,0 +1,423 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ecore:EPackage xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="doml" nsURI="http://www.piacere-project.eu/doml" nsPrefix="doml">
+  <eAnnotations source="emf.gen">
+    <details key="basePackage" value="eu.piacere.doml"/>
+    <details key="fileExtensions" value="domlx"/>
+    <details key="complianceLevel" value="JDK80"/>
+  </eAnnotations>
+  <eSubpackages name="commons" nsURI="http://www.piacere-project.eu/doml/commons"
+      nsPrefix="commons">
+    <eClassifiers xsi:type="ecore:EClass" name="DOMLModel" eSuperTypes="#//commons/DOMLElement">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="version" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"
+          defaultValueLiteral="2.2"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="application" eType="#//application/ApplicationLayer"
+          containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="infrastructure" eType="#//infrastructure/InfrastructureLayer"
+          containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="concretizations" upperBound="-1"
+          eType="#//concrete/ConcreteInfrastructure" containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="optimization" eType="#//optimization/OptimizationLayer"
+          containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="configurations" upperBound="-1"
+          eType="#//commons/Configuration" containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="activeConfiguration"
+          eType="#//commons/Configuration"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="activeInfrastructure"
+          eType="#//concrete/ConcreteInfrastructure"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="functionalRequirements"
+          upperBound="-1" eType="#//commons/Requirement" containment="true"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="Property" abstract="true">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="key" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="IProperty" eSuperTypes="#//commons/Property">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="value" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EIntegerObject"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="SProperty" eSuperTypes="#//commons/Property">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="value" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="FProperty" eSuperTypes="#//commons/Property">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="value" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="BProperty" eSuperTypes="#//commons/Property">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="value" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EBooleanObject"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="ExtensionElement" abstract="true">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="metaclassName" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="DOMLElement" abstract="true">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="name" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="description" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="annotations" upperBound="-1"
+          eType="#//commons/Property" containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="contributesTo" upperBound="-1"
+          eType="#//commons/Requirement" eOpposite="#//commons/Requirement/predicatesOn"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="Configuration" eSuperTypes="#//commons/DOMLElement">
+      <eStructuralFeatures xsi:type="ecore:EReference" name="deployments" upperBound="-1"
+          eType="#//commons/Deployment" containment="true"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="DeployableElement" abstract="true"/>
+    <eClassifiers xsi:type="ecore:EClass" name="Deployment">
+      <eStructuralFeatures xsi:type="ecore:EReference" name="component" lowerBound="1"
+          eType="#//commons/DeployableElement"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="node" lowerBound="1"
+          eType="#//infrastructure/InfrastructureElement"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="Requirement">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="name" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="description" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="property" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="predicatesOn" upperBound="-1"
+          eType="#//commons/DOMLElement" eOpposite="#//commons/DOMLElement/contributesTo"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="RangedRequirement" eSuperTypes="#//commons/Requirement">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="min" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="max" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="EnumeratedRequirement" eSuperTypes="#//commons/Requirement">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="values" upperBound="-1"
+          eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="DeploymentRequirement" abstract="true"
+        eSuperTypes="#//commons/Requirement"/>
+    <eClassifiers xsi:type="ecore:EClass" name="DeploymentToNodeTypeRequirement" eSuperTypes="#//commons/DeploymentRequirement">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="validTypes" upperBound="-1"
+          eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="DeploymentToNodeWithPropertyRequirement"
+        eSuperTypes="#//commons/DeploymentRequirement">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="min" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="max" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="values" upperBound="-1"
+          eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="DeploymentToSpecificNodeRequirement"
+        eSuperTypes="#//commons/DeploymentRequirement">
+      <eStructuralFeatures xsi:type="ecore:EReference" name="validElements" upperBound="-1"
+          eType="#//infrastructure/InfrastructureElement"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="Credentials" abstract="true" eSuperTypes="#//commons/DOMLElement"/>
+    <eClassifiers xsi:type="ecore:EClass" name="KeyPair" eSuperTypes="#//commons/Credentials">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="user" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="keyfile" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="algorithm" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="bits" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EIntegerObject"/>
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+    <eClassifiers xsi:type="ecore:EClass" name="UserPass" eSuperTypes="#//commons/Credentials">
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+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="password" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
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+    <eClassifiers xsi:type="ecore:EClass" name="Source" eSuperTypes="#//commons/DOMLElement">
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+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="backend" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+  </eSubpackages>
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+        eSuperTypes="#//commons/DOMLElement #//commons/DeployableElement"/>
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+      <eStructuralFeatures xsi:type="ecore:EReference" name="src" eType="#//commons/Source"
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+    <eClassifiers xsi:type="ecore:EClass" name="SaaS" eSuperTypes="#//application/ApplicationComponent">
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+    <eClassifiers xsi:type="ecore:EClass" name="SoftwareInterface" eSuperTypes="#//application/ApplicationComponent">
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+    <eClassifiers xsi:type="ecore:EClass" name="ExtApplicationComponent" eSuperTypes="#//application/ApplicationComponent #//commons/ExtensionElement"/>
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+      <eStructuralFeatures xsi:type="ecore:EReference" name="networks" upperBound="-1"
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+      <eStructuralFeatures xsi:type="ecore:EReference" name="rules" upperBound="-1"
+          eType="#//infrastructure/MonitoringRule" containment="true"/>
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+      <eLiterals name="EXTERNAL" value="2"/>
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+      <eStructuralFeatures xsi:type="ecore:EReference" name="maps" eType="#//infrastructure/FunctionAsAService"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="ComputingGroup" eSuperTypes="#//concrete/ConcreteElement">
+      <eStructuralFeatures xsi:type="ecore:EReference" name="maps" eType="#//infrastructure/ComputingGroup"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="ExtConcreteElement" eSuperTypes="#//concrete/ConcreteElement #//commons/ExtensionElement"/>
+  </eSubpackages>
+  <eSubpackages name="optimization" nsURI="http://www.piacere-project.eu/doml/optimization"
+      nsPrefix="optimization">
+    <eClassifiers xsi:type="ecore:EClass" name="OptimizationLayer" eSuperTypes="#//commons/DOMLElement">
+      <eStructuralFeatures xsi:type="ecore:EReference" name="startingHint" eType="#//commons/Configuration"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="solutions" upperBound="-1"
+          eType="#//optimization/OptimizationSolution" containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="objectives" upperBound="-1"
+          eType="#//optimization/OptimizationObjective" containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EReference" name="nonfunctionalRequirements"
+          upperBound="-1" eType="#//commons/Requirement" containment="true"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="ObjectiveValue">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="cost" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="availability" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="performance" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloatObject"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="OptimizationSolution" eSuperTypes="#//commons/Configuration">
+      <eStructuralFeatures xsi:type="ecore:EReference" name="objectives" eType="#//optimization/ObjectiveValue"
+          containment="true"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="decisions" upperBound="-1"
+          eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="OptimizationObjective" abstract="true"
+        eSuperTypes="#//commons/DOMLElement">
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="kind" lowerBound="1"
+          eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"
+          defaultValueLiteral="Max"/>
+      <eStructuralFeatures xsi:type="ecore:EAttribute" name="property" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
+    </eClassifiers>
+    <eClassifiers xsi:type="ecore:EClass" name="CountObjective" eSuperTypes="#//optimization/OptimizationObjective"/>
+    <eClassifiers xsi:type="ecore:EClass" name="MeasurableObjective" eSuperTypes="#//optimization/OptimizationObjective"/>
+    <eClassifiers xsi:type="ecore:EClass" name="ExtOptimizationObjective" eSuperTypes="#//optimization/OptimizationObjective #//commons/ExtensionElement"/>
+  </eSubpackages>
+</ecore:EPackage>
diff --git a/mc_openapi/doml_mc/common_reqs.py b/mc_openapi/doml_mc/common_reqs.py
index 2e5ae66d75617ebec53686d9fe57d0b99a1a3d40..798ef41e673c884cee8b727f5568f6182f207f0f 100644
--- a/mc_openapi/doml_mc/common_reqs.py
+++ b/mc_openapi/doml_mc/common_reqs.py
@@ -748,6 +748,23 @@ RequirementLists = {
         # TODO: Fix rule
         # (external_services_must_have_https, "external_services_must_have_https", "All external SaaS should be accessed through HTTPS.", ed_external_services_must_have_https)
     ],
+    DOMLVersion.V2_2_1: [
+        (vm_iface, "vm_iface",
+         "All virtual machines must be connected to at least one network interface.", ed_vm_iface),
+        (software_package_iface_net_v2_1, "software_package_iface_net",
+         "All software packages can see the interfaces they need through a common network.", ed_software_package_iface_net),
+        (iface_uniq, "iface_uniq", "There are no duplicated interfaces.", ed_iface_uniq),
+        (all_SoftwareComponents_deployed, "all_SoftwareComponents_deployed",
+         "All software components have been deployed to some node.", ed_all_SoftwareComponents_deployed),
+        (all_infrastructure_elements_deployed, "all_infrastructure_elements_deployed",
+         "All abstract infrastructure elements are mapped to an element in the active concretization.", ed_all_infrastructure_elements_deployed),
+        (all_concrete_map_something, "all_concrete_map_something",
+         "All elements in the active concretization are mapped to some abstract infrastructure element.", ed_all_concrete_map_something),
+        (security_group_must_have_iface, "security_group_must_have_iface",
+         "All security group should be a associated to a network interface", ed_security_group_must_have_iface),
+        # TODO: Fix rule
+        # (external_services_must_have_https, "external_services_must_have_https", "All external SaaS should be accessed through HTTPS.", ed_external_services_must_have_https)
+    ],
 }
 
 
diff --git a/mc_openapi/doml_mc/intermediate_model/metamodel.py b/mc_openapi/doml_mc/intermediate_model/metamodel.py
index 5b7f31251661ee7e7a326b323f34b54177b319e7..186c68a962f0ecd22f41fdef41906adf1673d522 100644
--- a/mc_openapi/doml_mc/intermediate_model/metamodel.py
+++ b/mc_openapi/doml_mc/intermediate_model/metamodel.py
@@ -14,6 +14,7 @@ class DOMLVersion(Enum):
     V2_0 = "v2.0"
     V2_1 = "v2.1"
     V2_2 = "v2.2"
+    V2_2_1 = "v2.2.1"
 
     def get(v: str):
         """Retrieve DOML version from string.