Platform as a Service virtual application patterns are realized by supporting a combination of application-centric deployment models, virtual applications (consisting of individual components and policies), the infrastructure and middleware they employ, and workload-specific content -- extensions or "plug-ins" that define components, links, and policies used to describe and deploy virtual application patterns, such as those usable on both the IBM SmartCloud Enterprise cloud and IBM PureSystems. This article explains how to get started with the IBM Workload Plug-in Development...