This is an Ingest LDD file for the Particle Discipline Local Data Dictionary. It contains attributes that may be used to help identify particle parameters included in a PDS4 product to supplement the information provided in the Primary_Result_Summary and in order to support enhanced data discovery. Modification History: 1.0.0.0 (Todd King) - Initial version. Included classes for defining relationships between multidimensional data objects (subsequently moved to the Multidimensional dictionary). 1.1.0.0 (Todd King) 2.0.0.0 (J. Mafi, 2021-02-24): - Removed classes related to multidimensional data objects. - Added particle data parameter description attributes and classes. 2.0.1.0 (J. Mafi, 2021-06-24): - Updated to IM V.1.16.0.0 - Added permissible value "Energy Flux" to Particle_Observation/Particle_Parameter/particle_measurement_type The Particle_Observation class is the container for particle discipline related metadata elements. The Particle_Parameter class contains metadata identifying specific particle science parameters. 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 common namespace. The energy_range_minimum attribute indicates the highest measured energy for the described particle_type. The energy_range_minimum attribute indicates the lowest measured energy for the described particle_type. The ion_type attribute indicates the types of ions measured. The particle_measurement_type attribute indicates the type of particle measurement parameters. The particle_type attribute indicates the type of particle being described.