Jadpo is experimental and not ready for production. These docs follow the compiler's main branch as of 1 Nov 2026. What's built · Install 0.2.0
jadpo
Reference: Standard library

Standard types

AltText

On this page

What an image shows, for someone who can't see it (WCAG 2.2's text alternative): one line of 1 to 1,000 characters. An image with nothing to say has none.

Media and visual; not ordered; since Jadpo 0.1.0.

Make one

Build one from its text, AltText("A red bicycle leaning against a brick wall"), which checks it: text that isn't one breaks format.

text.parse(raw, as: AltText) reads one from its text; text that isn't one at all fails malformed, such as "", Logo or Logo .

Text, JSON and storage

text.from writes its canonical text, the one form text.parse reads back. JSON sends its canonical text as a string.

Text JSON
A red bicycle leaning against a brick wall "A red bicycle leaning against a brick wall"
Logo "Logo"

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

Shown to people

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

With locale: Locale.en_gb:

Value Shown
A red bicycle leaning against a brick wall A red bicycle leaning against a brick wall
Logo Logo

Operations

It has the contract's own operations: text.parse, text.from, text.format, json.read, json.write and ==. It isn't ordered, so < and sorting don't take it. Every standard type meets one contract says how they work.

Markdown for agents: /docs/types/type-alt-text.md.Built from Jadpo main at e00e61f.