codec_json.md
In artoo: Lossless CDISC-Native Input and Output for Clinical Datasets

NaN and Inf abort the write (C2)

Code
  write_json(df, tempfile(fileext = ".json"))
Condition
  Error in `write_json()`:
  ! Column `N` contains "Inf".
  x NaN and infinite values are not valid in CDISC Dataset-JSON.
  i Recode them to NA, or use a string dataType.

a non-Dataset-JSON file aborts cleanly (E2)

Code
  read_json(p)
Condition
  Error in `read_json()`:
  ! '<path>' is not a Dataset-JSON v1.1 file.
  x It lacks the datasetJSONVersion and columns keys.
  i artoo reads CDISC Dataset-JSON v1.1; check the producing tool and version.