Jadpo is experimental and not ready for production. These docs follow the compiler's main branch as of 5 Nov 2026. What's built · Install 0.3.0
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ReferenceOther with a published standard

LanguageValues and typesStandard typesOther with a published standard

Mprn

On this page

A UK gas supply's number: 6 to 10 digits.

Use it to switch or identify a gas supply. For electricity, use Mpan.

Shape

One value, held as text in one set form, with no parts: 9876543210.

Example

example
Mprn("1234567")

Mprn(raw) checks the text, and text that isn't one breaks the format rule.

text.parse(raw, as: Mprn) reads one from text that comes from outside. Text that isn't one at all fails malformed, such as 12345, 12345678901 or 12 34567.

Good to know

  • == tells you whether two are the same. < and list.sort_by don't take it.
  • A field that holds one counts as personal data (contact), so you don't mark it yourself.

In JSON

A string, in a request, a response or json.write:

json
"1234567""9876543210"

Details

Text form, storage, how it is shown, and operations

Mprn is in the group Other with a published standard, and has been in Jadpo since 0.1.0.

Text form

text.from writes one standard text form, the same form text.parse reads back: 1234567 and 9876543210.

How it is stored

It is stored in one column named for the field, of type text. 9876543210 is stored as '9876543210'.

How it is shown to people

text.format(value, locale:) shows it to people in their locale.

With locale: Locale.en_gb:

Value Shown
1234567 1234567
9876543210 9876543210

Operations

It also takes text.parse, text.from, text.format, json.read, json.write and ==. How every standard type behaves says how they work.

Markdown for agents: /docs/types/type-mprn.md.Built from Jadpo main at aee2e8f.