Layer L1 – Data

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• Layer ID: l1

• Category: construction

• Sub-layers: 7

• Axes: 26

• Options across axes: 108

Sub-layers

Sub-layer	Name	Gate	Axes
l1_a	Source selection	always	custom_source_policy, dataset, frequency, information_set_type, vintage_policy, fred_sd_frequency_policy
l1_b	Target definition	always	target_structure
l1_c	Predictor universe	always	variable_universe, missing_availability, raw_missing_policy, raw_outlier_policy, release_lag_rule, contemporaneous_x_rule, official_transform_policy, official_transform_scope
l1_d	Geography scope	always	target_geography_scope, predictor_geography_scope, fred_sd_state_group, state_selection, fred_sd_variable_group, sd_variable_selection
l1_e	Sample window	always	sample_start_rule, sample_end_rule
l1_f	Horizon set	always	horizon_set
l1_g	Regime definition	always	regime_definition, regime_estimation_temporal_rule