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Build and Validate a Column Map Against a Dataset

Source: R/prep_schema.R
prep_build_column_map.Rd

Validates a user-supplied column map against the actual columns present in a data frame. Reports which mappings are present, which are absent, and which data columns are not covered.

Usage

prep_build_column_map(data, column_map = NULL, custom_map = NULL)

Arguments

data

Data frame with raw column names.

column_map

Named character vector: standard_name = raw_name. Pass a dataset-specific map from your analysis layer. If NULL, generic alias detection is attempted.

custom_map

Named character vector. Additional raw -> standard overrides applied on top of column_map. Optional.

Value

Named character vector with only mappings whose raw names exist in data.

Details

Dataset-specific maps (ICMR stewardship, surveillance, AIIMS, etc.) should be defined in the analysis layer and passed in via column_map. If no map is supplied, falls back to auto-detection using default_column_mappings aliases.