Table of contents:

Addresses: 

YANG Schema Mount Mechanism Overview

The YANG schema  schema mount mechanism is described in RFC-8528.The main idea is to provide.

In opposite to standard YANG's "use" and "augment" the schema mount mechanism allows the model modification at runtime. 
While parent (extendable) module require to define the mount point(s) any already defined (legacy) module (including standard)
can be used as a mounted model.

The ietf-yang-schema-mount module defined in RFC-8528 defines structures for following entities:

• mount-point - for mount point(s) definition within parent (extendable) module 
• schema-mounts - describes the model for actual assignment of mounted models to mount points

mount-point

Mount point is uniquely identified by its name (label) and the only requirements are

• allocation only within a YANG module of version 1.1+
• allocation only within a "container" or a "list" definition

Below is example of simple mount-point definition

module test-mount {
    yang-version 1.1;
    namespace "org:onap:cps:test-mount";
    prefix tmount;
    revision "2020-02-02";

    import ietf-yang-schema-mount {
         prefix yangmnt;
    }

    container test-mount-root {
        yangmnt:mount-point "root";
	}
}

schema-mount

Implementation Approach in a Context of CPS