type: //rec
required:
  protocol:
    type: //rec
    required:
      name: //str
      longname: //str
      osilayer: //int
      fields: &fields
        type: //arr
        contents: {
          type: //rec
          required:
            field: //str
            desc: //str
            length: //int
          optional:
            bitfield: //bool
            optional: //bool
            nextlayer: //bool
            data: //bool
            reference: //str
            reflenght: //str
            subfields: *fields
        }