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Bayer and McCreight: organization of large ordered indexes

Contribution grade

Data structures and databases · External-memory indexing

Reference score230,000Provisional editorial estimate of this exact contribution; its grade is assessed separately.

What changed

Large changing ordered indexes gained a page-efficient balanced data structure with analyzed operations.

Scientific scope

1972 two-author B-tree paper; B+ variants and concurrent or database-specific implementations excluded.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. This is the 1972 Acta Informatica paper and its B-tree organization. Later variants such as B+ trees, concurrent indexes and database-specific implementations remain distinct.

Contributors

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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