YANG modules contain the definitions of the ____________________ that can be issued and the format of the notifications. code example

Example: yang model

module acme-system {
    namespace "http://acme.example.com/system";
    prefix "acme";

    organization "ACME Inc.";
    contact "[email protected]";
    description
        "The module for entities implementing the ACME system.";

    revision 2007-11-05 {
        description "Initial revision.";
    }

    container system {
        leaf host-name {
            type string;
            description "Hostname for this system";
        }

        leaf-list domain-search {
            type string;
            description "List of domain names to search";
        }

        list interface {
            key "name";
            description "List of interfaces in the system";
            leaf name {
                type string;
            }
            leaf type {
                type string;
            }
            leaf mtu {
                type int32;
            }
        }
    }
}