schema:             ROUTE-SET-SCHEMA
ref:                nx3.route-set
dir-name:           route-set
key:                route-set    required  single    primary schema
key:                descr        optional  multiple
key:                mnt-by       required  multiple  lookup=nx3.mntner
key:                members      deprecate multiple
key:                mp-members   optional  multiple
key:                mbrs-by-ref  optional  multiple  lookup=nx3.mntner
key:                admin-c      optional  multiple  lookup=nx3.person,nx3.role
key:                tech-c       optional  multiple  lookup=nx3.person,nx3.role
key:                remarks      optional  multiple
key:                source       required  single    lookup=nx3.registry
mnt-by:             NX3-MNT
source:             NX3