World Discovery Engine
Verified source coverage

From archived releases to verifiable evidence.

This map separates releases we can locate from comparisons we have actually validated. Archive presence is a candidate signal, never proof of comparability.

Open the verified population hub → · Compare all current evidence →

REAL SOURCE METADATA · FAIL-CLOSED PROMOTION

Current evidence coverage

15

Verified country comparisons

The current production set compares 2023 population values across two archived 2025 WDI releases.

Inspect the evidence →
2

Vintages in production

28 Jan 2025 and 2 Jul 2025 are the exact publication vintages behind the current REAL evidence family.

Open indicator hub →
5

Observed revisions

Five of the 15 country values changed; ten verified null results remain visible to avoid selection bias.

See verified findings →

Recent archive runway

The official World Bank WDI archive lists the release months below. These are screening candidates only. A pair is promoted when entity, indicator, period, unit and methodology are safe to compare.

YearArchived release monthsCandidate releasesProduction use
2026January, February2Not yet promoted
2025January, March, April, June, July, October, December7Jan + Jul validated for population
2024February, May, July, September, October, November, December7Screening runway
2023March, May, June, July, September, October, December7Screening runway

Why the archive is the growth engine

1989+

Historical runway

The World Bank documents electronic WDI releases going back to 1989. That creates decades of potential revision history without manufacturing content.

23

Recent release candidates

The 2023–2026 calendar alone exposes 23 archived release points that can be screened for stable indicators and meaningful changes.

QUALITY GATE

More pages only after proof

Series codes can survive changes in base year, valuation or methodology. Unsafe pairs are rejected rather than turned into misleading SEO pages.

Evidence promotion pipeline

1

Locate + preserve

Identify dated releases and preserve exact source identity, archive URL and vintage.

2

Normalize + validate

Match entity, indicator and period; then fail closed on incompatible unit, semantics or methodology.

3

Publish + connect

Validated results become stable HTML evidence, JSON/CSV exports, indicator hubs and discovery links.

Official source: World Bank, World Development Indicators — WDI Archives. Open the official archive page →