Docs · Validators

`gln` validator

GS1 Global Location Number — 13 digits with GTIN-style checksum.

Get an API key Read the docs

One of 19 validator types · pure compute, no AI cost

Reference

Format

Matches `/^\d{13}$/`, then delegates to the GTIN checksum (mod-10 weighted 3,1,3,1…) for the trailing digit.

Examples

7601001000001 (sample CH GLN)
4012345000009 (sample DE GLN)
0614141999996

How it runs

Implementation

A faithful summary of lib/validators.ts. Validators are pure functions and run identically in the Worker, the Workbench and the MCP server — one implementation, so the three cannot disagree about whether a value is valid.

lib/validators.ts

function validGln(value) {
  if (!/^\d{13}$/.test(value)) return fail('gln_format', 'expected 13 digits')
  return validGtin(value)   // same mod-10 checksum
}

Config

Use in a template

Validators attach to a field on a custom template. The cascade runs them after mapping but before commit; failures surface in the per-row validation report.

template.yaml

fields:
  - column: gln
    type: string
    validators:
      - type: gln

Watch out

Common gotchas

GLN and GTIN-13 share the same checksum. A "valid GLN" might syntactically also be a valid GTIN — the namespaces overlap; only the GS1 prefix tells them apart.
No GS1 GEPIR (company prefix) lookup. We cannot tell you who owns a given GLN.
Leading zeros are significant. Send as a string.

Where it runs

Three routes, no AI cost.

POST/v1/validate-rowValidate one row against a template. Stateless, no key, pure compute — the fastest way to try gln against a real value.no key
POST/v1/uploads/:id/validateRun every field validator over the parsed upload, without committing. Returns errors and warnings per row.read
POST/v1/uploads/:id/commitValidates on the way out. skip_invalid_rows drops the failures instead of failing the commit.commit

Validators are pure functions, so they add nothing to the AI bill. Every map draws a small flat per-map fee from your prepaid token wallet ($10 minimum, shared across the phi-cloud suite); only columns that reach the metered LLM layer, plus any-to-any convert and structural reshape, bill real AI tokens. See pricing

Catalogue

Related templates

Employee rosteremployee_roster_v1
Names, AHV/GLN, contract type, address.
Fields · gln
Supplier inventorysupplier_inventory_v1
Supplier catalogue with GTIN/IBAN/GLN.
Fields · gln
Provider directoryprovider_directory_v1
Providers with NPI/GLN/license metadata.
Fields · gln

Explore

All 19 validator types

The complete list a template field can declare. There is no SNOMED validator — it required an affiliate licence, no template used it, and it was removed in 2026.

Back to the documentation index or browse the template catalogue.

Ready when you are

Validate every row — before it lands.

Attach checksum-strict validators to any field, and gate risky commits behind the requires_hitl flag. One key runs the whole cascade.

Get an API key See pricing

Prepaid token wallet · schema-only data-minimization mode · no free tier

gln validator