{
  "text": "The only model input. Document text, not an instruction/completion pair.",
  "label": "String class name in standard configurations; integer ClassLabel in *_ids configurations.",
  "label_id": "Version-pinned integer class ID.",
  "label_name": "Readable class name.",
  "record_id": "Stable observation ID.",
  "group_id": "Template lineage for split integrity; not a model feature.",
  "document_status": "Separate original/corrected/instruction/unknown metadata. Not proof of form receipt.",
  "tax_year": "Nullable source year metadata, not a model input for type prediction.",
  "source_record_id": "Lineage ID: fte-* for v1.0.0 rows (source dataset observation), fgen-* for v1.1.0 generator rows.",
  "origin": "synthetic_AI_labeled (v1.0.0 rows) or synthetic_programmatic_template (v1.1.0 rows).",
  "layout": "Metadata: extraction layout the row imitates (stacked, inline, columns, boxed, csv, flat, markdown); v1_template for v1.0.0 rows. Not a model input.",
  "title_mode": "Metadata: top, bottom or none (title lines removed). Not a model input.",
  "ocr_noise": "Metadata: true when scan-like character damage was applied. Not a model input.",
  "sub_kind": "Metadata: generator sub-kind (for example escrow_analysis, raw_export, utility_bill, SSA-1099); null for forms and v1.0.0 rows. Not a model input."
}