FA-48827 / Delimited text / Member archive

Hierarchical header components are combined in reverse level order · case 02

A structured table violates the declared record or column contract.

Member previewVariant 2 · 3 implementations · 9 checks per implementation

Case contract

Decode a table with an integer preamble giving the number of following physical header rows. Each header row is comma cells; combine corresponding column labels with /, omitting empty components. At least one header row is required, widths must agree, final names must be nonempty and unique. Remaining rows are body and must match width. Return header and body.

Why this case matters

Delimited interchange needs explicit framing, schema and field semantics at ingestion and emission boundaries.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
levels	`{"header": ["a/group", "b/group"], "rows": [["cellcell", "z"]]}`	`{"header": ["group/a", "group/b"], "rows": [["cellcell", "z"]]}`	Failed

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