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

an unknown path extension aborts via the codec registry

Code
  columns("spec.docx")
Condition
  Error:
  ! No codec handles the "docx" extension.
  i Known extensions: "json", "jsonl", "ndjson", "parquet", "pq", "rds", "xport", and "xpt".

print is the left-aligned SAS pane (snapshot)

Code
  print(columns(dm))
Output
  <artoo_columns> DM -- 25 variables, 60 obs
  #   Variable  Type  Len  Format  Label                               Key
  1   STUDYID   Char  12           Study Identifier
  2   DOMAIN    Char  2            Domain Abbreviation
  3   USUBJID   Char  11           Unique Subject Identifier
  4   SUBJID    Char  4            Subject Identifier for the Study
  5   RFSTDTC   Char  10           Subject Reference Start Date/Time
  6   RFENDTC   Char  10           Subject Reference End Date/Time
  7   RFXSTDTC  Char  10           Date/Time of First Study Treatment
  8   RFXENDTC  Char  10           Date/Time of Last Study Treatment
  9   RFICDTC   Char  1            Date/Time of Informed Consent
  10  RFPENDTC  Char  16           Date/Time of End of Participation
  11  DTHDTC    Char  10           Date/Time of Death
  12  DTHFL     Char  1            Subject Death Flag
  13  SITEID    Char  3            Study Site Identifier
  14  AGE       Num                Age
  15  AGEU      Char  5            Age Units
  16  SEX       Char  1            Sex
  17  RACE      Char  32           Race
  18  ETHNIC    Char  22           Ethnicity
  19  ARMCD     Char  8            Planned Arm Code
  20  ARM       Char  20           Description of Planned Arm
  21  ACTARMCD  Char  8            Actual Arm Code
  22  ACTARM    Char  20           Description of Actual Arm
  23  COUNTRY   Char  3            Country
  24  DMDTC     Char  10           Date/Time of Collection
  25  DMDY      Num                Study Day of Collection