mappings/Veg+-VegCore.csv: Add pass through /_alt mapping for all terms in this map that are merged with _alt, to allow datasource to define custom mappings that don't pass through the default mapping. This also allows mappings/Veg+-VegCore.csv to be joined with itself idempotently, to support multi-level chains of mappings.
mappings/Veg+-VegCore.csv: Add pass through /_alt mapping for all terms in this map that are merged with _alt, to allow datasource to define custom mappings that don't pass through the default mapping. This also allows mappings/Veg+-VegCore.csv to be joined with itself idempotently, to support multi-level chains of mappings.