| # FRED-SemBench V1 Candidate Data Dictionary |
|
|
| ## `concepts.json` |
|
|
| - `concept_id`: frozen benchmark identifier from `FRED-C001` to `FRED-C050`. |
| - `name`: human-readable indicator concept. |
| - `series_id`: canonical FRED series used by the benchmark. |
| - `frequency`: reported observation frequency. |
| - `official_source`: agency responsible for the underlying statistic. |
| - `unit` / `display_unit`: normalized and human-readable units. |
| - `precision`: decimal quantization used for gold answers. |
| - `change_kind`: deterministic rule used to construct the change fact. |
| - `alternative_series_id`: plausible confounder used in disambiguation cases. |
|
|
| ## `facts.jsonl` |
|
|
| Each concept has a `level` fact and a `change` fact. |
|
|
| - `fact_id`: stable fact identifier. |
| - `benchmark_concept_id`: foreign key to `concepts.json`. |
| - `series_ids`: required provider series. |
| - `observation_period` / `observation_dates`: human and ISO representations. |
| - `as_of`: benchmark snapshot cutoff. |
| - `vintage_mode`: currently `frozen_current_vintage`. |
| - `raw_observations`: values used by the deterministic derivation. |
| - `derivation`: transform name and formula description. |
| - `answer`: numeric gold, unit, and precision. |
| - `source`: official source, provider, and series URL. |
| - `snapshot`: request URL, local file, snapshot ID, and SHA-256. |
| - `verification`: automatic recomputation status. |
|
|
| ## `questions.jsonl` |
|
|
| - `case_id`: stable ID from `fred_sem_0001` to `fred_sem_0200`. |
| - `primary_concept_id`: concept used for allocation and stratification. |
| - `task_type`: one of the six frozen task types. |
| - `fact_ids`: evidence records; empty for clarification cases. |
| - `gold.answer_mode`: `numeric` or `clarification`. |
| - `gold`: concept, series, transform, period, answer, provenance, and required response elements. |
| - `confounders`: alternative series and the expected common error. |
| - `annotation`: review status and review notes. |
|
|
| ## Review files |
|
|
| - `allocation.csv`: one row per concept and one binary column per task type. |
| - `questions_review.csv`: flattened review view; reviewers complete |
| `reviewer_decision` and `reviewer_notes`. |
| - `QA_REPORT.md`: automated results and unresolved release gates. |
|
|
| ## Snapshot semantics |
|
|
| The CSV files reproduce the provider responses downloaded on 2026-07-29. They |
| are frozen current-vintage evidence, not historical ALFRED vintages. A future |
| historical-vintage extension must use a distinct benchmark version. |
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|
