YumaWorks This document describes mechanisms for defining a conceptual collection of YANG modules and protocol capability URIs, called a YANG package. Typically, modules with high cohesion that are designed to be used together to manage a service or product feature are included in a YANG package. The purpose of the package is not constrained by this document. For example, a YANG package may describe conformance requirements or simply describe the modules and protocol capabilities implemented in a specific platform.