This deliverable is the output of tasks 3.1, 3.2 and 3.3. It will contain the metamodel and the corresponding semantic and machine-readable descriptions of the aspects that are relevant to the main phases of the IaC lifecycle seamlessly integrated with the design and development of the IaC lifecycle. This metamodel will be then presented as an end-user language enabling the modelling of the different elements needed for the infrastructure provisioning, configuration management and deployment, the deployable infrastructural components, constraints and so on. The various iterations will seek and take into consideration the feedback from PIACERE’s end users and, possibly, other users outside the project to ensure that the language is sufficiently powerful and simple to use.