Suggest compatible formats and checksum schemes.
Initialising algorithm engine for Identifier Scheme Finder...
How Identifier Scheme Finder Works?
The Identifier Scheme Finder compares an input with known code formats. It checks length, character pattern, prefix and separators. It then tests the checksums of the formats that match.
- 1Paste an unknown identifier.
- 2Measure length and character classes (digits, letters, symbols).
- 3Match prefixes such as 978, 4, GB, or 89.
- 4Run every matching scheme's checksum.
- 5Rank schemes with a passing checksum first.
Identifier Scheme Finder Formula
The scheme finder formula is Candidates = { s : pattern_s(input) ∧ valid_s(input) }, ranked by match strength.
Candidates = { s ∈ Schemes | length_s ∧ charset_s ∧ prefix_s ∧ checksum_s }
score(s) = Σ matched testspattern_scovers length, character set, and prefix.
Length 15, digits only Prefix 49 → IMEI TAC range Luhn check passes Best match = IMEI
Identifier Scheme Finder Conversion Table
The Identifier Scheme Finder table maps 9 sample inputs to their matching scheme and checksum.
| Input | Pattern | Likely scheme | Checksum |
|---|---|---|---|
5901234123457 | 13 digits | EAN-13 / GTIN-13, ISBN-13 (978/979), ISMN (9790) | GS1 Mod 10 |
036000291452 | 12 digits | UPC-A / GTIN-12 | GS1 Mod 10 |
4111111111111111 | 16 digits, starts with 4 | Visa card number | Luhn |
490154203237518 | 15 digits | IMEI, Amex card (34/37) | Luhn |
GB82WEST12345698765432 | 2 letters + 2 digits + 18 | IBAN | ISO 7064 MOD 97-10 |
1M8GDM9AXKP042788 | 17 characters, no I/O/Q | VIN | Weighted Mod 11 |
0000-0002-1825-0097 | 4 × 4 with hyphens | ORCID iD, ISNI | ISO 7064 MOD 11-2 |
CSQU3054383 | 4 letters + 7 digits | ISO 6346 container | Powers of 2, Mod 11 |
12345678Z | 8 digits + letter | Spanish NIF | Mod 23 letter |
What is Identifier Scheme Finder?
An Identifier Scheme Finder is a tool that suggests which identifier format and checksum an unknown code belongs to. The finder combines format rules with checksum tests.
An input can fit 2 or more schemes: a 13-digit code starting with 978 is both an EAN-13 and an ISBN-13, and both use the same check digit.
What are the uses of Identifier Scheme Finder?
There are 3 main uses of the Identifier Scheme Finder, including unknown data columns, customer support, and data imports.
- Unknown data columns: Analysts identify what a column of codes holds.
- Customer support: Agents identify a number a customer reads out.
- Data imports: Developers map incoming fields to the right validator.