Specifying a Management Plane for the Software-Defined Networking (SDN) architecture is essential for monitoring, configuring and handling computer networks. Diverse solutions have proposed it but they share some shortcomings: incomplete representations of SDN elements, few human-readable languages for managing networks, no communication management aimed at Internet Engineering and absence of supporting communication between Autonomous Systems. In this paper, we introduce a protocol-agnostic Data Model based on YANG that specifies a vertical SDN management Plane, handles technology heterogeneity and supports inter-domain communication. To test our Data Model, we evaluate a prototype in an SDN configuration scenario that includes devices supporting diverse technologies. The obtained results provide directions that corroborate the efficiency of our approach in terms of time-response and network traffic.