"Software-defined infrastructure consists of fully virtualized compute, networking, and storage resources that are logically pooled and can be managed as if they were software. This allows policy-based infrastructure provisioning and enables IT automation."
A "software-defined platform" means that a foundational software-based product or service is used to enable the development of complementary products or services by external parties. It's a core system with shared functionality and interfaces for applications to interact with, managed by the platform owner. The platform's ecosystem includes the platform itself and the applications that interoperate with it.
Looks like informatized/network centric focused approach to warfare to me. In other words maybe can be linked up as part of a larger network to be coordinated by an AI assisted C4IS system.