Builtin Interfaces
These are primitive types which do not have schema definitions but are the basic primitive building blocks for schemas.
Duration
Duration defines a period between two time points. Messages of this datatype are of ROS Time following this design: https://design.ros2.org/articles/clock_and_time.html
nanosec
class-attribute
instance-attribute
nanosec: uint32 = 0
The nanoseconds component, valid in the range [0, 10e9).
sec
class-attribute
instance-attribute
sec: int32 = 0
The seconds component, valid over all int32 values.