field,value,definition,notes
direct_support,observation in same calendar year,Observation in the same calendar year as the election-year estimate,
nearby_support,observation within threshold,Observation within the stated distance threshold of the election-year estimate,
nearby_support_threshold_years,2,Numerical threshold in years used to classify nearby support,
temporal_propagation,no nearby observation,No text or expert observation within the nearby threshold,
source_support_class,both_direct_or_nearby,Both text and expert evidence are direct or nearby,
source_support_class,text_only_direct_or_nearby,Text evidence is direct or nearby and expert evidence is not,
source_support_class,expert_only_direct_or_nearby,Expert evidence is direct or nearby and text evidence is not,
source_support_class,temporal_propagation,Neither text nor expert evidence is direct or nearby,