Inline data payload — the assembled feature matrix in columnar header + row-array form. The sidecar contract also allows a shared-storage handle (data_ref) for very large training sets; inline is implemented first (plan §3.1).
data_ref
Ordered column names (aligns with each row's value order).
Row-major data: each inner array is one record's values, column-aligned.
Inline data payload — the assembled feature matrix in columnar header + row-array form. The sidecar contract also allows a shared-storage handle (
data_ref) for very large training sets; inline is implemented first (plan §3.1).