ErrorCorrectionLevel

ErrorCorrectionLevel = "L" | "M" | "Q" | "H"

Defined in: version.ts:13

Capacity tables + version metadata from ISO/IEC 18004 §6.5 and Annex D.

Each version 1-40 has 4 ECC levels (L, M, Q, H). For each (version, ECC) the spec defines:

• Total data codewords (dataCodewords)
• Number of error-correction blocks (groups)
• Block sizes within each group

The matrix dimension is (version - 1) * 4 + 21.