This XML schema file has been generated from the PDS4 Information Model. The MAVEN class is the container for MAVEN mission-specific metadata elements. The Parameter class provides information about a specified data parameter. This section contains the simpleTypes that provide more constraints than those at the base data type level. The simpleTypes defined here build on the base data types. This is another component of the common dictionary and therefore falls within the pds namespace. The mission_event_time_start_count attribute provides the mission event time value at the beginning of a time period of interest. The mission_event_time_stop_count attribute provides the mission event time value at the end of a time period of interest. The mission_phase_name attribute provides the mission-defined name of a mission phase. The spacecraft_clock_start_count attribute provides the value of the spacecraft clock at the beginning of a time period of interest. The spacecraft_clock_stop_count attribute provides the value of the spacecraft clock at the end of a time period of interest.