module: example-uses-geo-location
    +--rw locatable-items
       +--rw locatable-item* [name]
          +--rw name            string
          +--rw geo-location
             +--rw reference-frame
             |  +--rw alternate-system?    string
             |  |       {alternate-systems}?
             |  +--rw astronomical-body?   string
             |  +--rw geodetic-system
             |     +--rw geodetic-datum?    string
             |     +--rw coord-accuracy?    decimal64
             |     +--rw height-accuracy?   decimal64
             +--rw (location)?
             |  +--:(ellipsoid)
             |  |  +--rw latitude?    decimal64
             |  |  +--rw longitude?   decimal64
             |  |  +--rw height?      decimal64
             |  +--:(cartesian)
             |     +--rw x?           decimal64
             |     +--rw y?           decimal64
             |     +--rw z?           decimal64
             +--rw velocity
             |  +--rw v-north?   decimal64
             |  +--rw v-east?    decimal64
             |  +--rw v-up?      decimal64
             +--rw timestamp?         yang:date-and-time
             +--rw valid-until?       yang:date-and-time