One data record with its typed reading.

record_type is :ar, :as, :cr, :dr or :ms; satellite is the canonical identifier of an AS record and nil otherwise. civil_epoch keeps the epoch fields, its second the nearest double to every digit the seconds field states; epoch is the instant in the product's time scale, nil when the time system resolves to no scale. values are the declared values, bias first; surplus_values are values present beyond the declared count as %{position: index, value: value}. line is the one-based line of the record in the source (nil for a record built or edited through the API) and line_count the lines it spans. reading and continuation_reading say how the first and continuation lines were read: {:columns, :v300 | :v304}, {:columns_trailing_text, :v300 | :v304}, :whitespace or :edited. The trailing suffix itself remains retained by the core when declared values are edited and the product is written; trailing_text_bytes and zero-based trailing_text_column expose it on the record and survive value edits.