Scope freeze
The collection scope is an immutable snapshot of Index 1–1000 from the QS 2027 workbook, keeping the source file hash and the original rank display values.
Methodology
How data enters the catalog
Catalog facts are stored as raw snapshots first, then normalized, quality-checked, and reviewed before publication. This page explains our data methodology — it is not an admission promise.
Fact collection
QS detail pages are collected with a slow-polite browser; profiles, logos, programs, and requirements each keep their source URL, raw snapshot, and parser version.
Publication gate
Collection state and review state are tracked separately. Unpublished, not-found, restricted, and pending data is never silently filled in.