Observations

       public final static Schema HEADER_SCHEMA = 
            new JSONSchema.Array()
                .add(new JSONSchema.ByteConstant(PACKET_TYPE))
                .add(new JSONSchema.ByteConstant(PACKET_VERSION))
                .add(new JSONSchema(Descriptors.App.TYPEID, App.APPNAME, App.VERSION))
                .add(new JSONSchema(Descriptors.Device.TYPEID,
                        new String[] {
                            Device.CARRIER,
                            Device.PLATFORM,
                            Device.NAME}))
                .add(new JSONSchema.ByteConstant(0));