[holonsoftFounder]

What is in here

The last batch of 6.1 data sources, in four commits:

• VinSource / NullableVinSource: seventeen character VINs with the valid North American check digit at position nine (transliteration table and weights per standard), I/O/Q never appear, the model year position follows 49 CFR 565, optional WMI prefix. Calibrated against the standard's example (check digit X) and the all-ones number.
• MacAddressSource / TestMacAddressSource (+ Nullable variants): unicast MAC addresses as upper case hex in three formats. The plain source draws universally administered addresses; the test variant sets the locally administered bit, the space IEEE 802 keeps free of manufacturer assignments, so those addresses provably name no vendor hardware.
• GuidV7Source / NullableGuidV7Source: RFC 9562 version 7 UUIDs whose 48 timestamp bits come from a seeded date range instead of the clock, so a seed reproduces the same UUIDs on every run. Version and variant bits are correct; the encoded instant stays inside the range.
• PatternSource (# digit, @ capital letter, * both, backslash escapes) with SkuSource, SerialNumberSource and LotNumberSource on top. These codes follow no public standard, so the pattern is the contract, stated openly; the lot number stamps the widespread year + day-of-year date code from a seeded date range.
• LatitudeSource / LongitudeSource: decimal degrees with bounding box, documented as independent draws (a meaningful place needs Impose).
• EoriSource / NullableEoriSource: EORI customs numbers (Annex 12-01 UCC IA) for BE, DE, DK, FR, GB, HR, IT, NL, PL, XI. The format has no check digit of its own, so the national part is built from the underlying national identifier with its real checks (enterprise number, CVR, doubly Luhn-valid SIRET, OIB, partita IVA, NIP + 00000, VAT registration number + 000). Austria publishes no structure and the Portuguese third country check digit is unpublished, so both stay out, with the reason in the docs. The tests document that the official format examples of HMRC and the EU Commission fail the national checksums and are rejected on purpose.

Verification

• dotnet build -c Release: zero warnings.
• dotnet test on net8/9/10: 4932 passed, 12 known skips (~190 new tests).
• Every check digit source is calibrated against official worked examples or registered real identifiers before the validator judges the generator; validators run the arithmetic in the opposite direction where the scheme allows it.
• EORI and VIN structures come from primary sources (Annex 12-01 UCC IA / EC national implementation document, 49 CFR 565), gathered and cross-checked per country; unverifiable countries are excluded rather than guessed.

Tagging v6.1.0 follows after the merge.

🤖 Generated with Claude Code