Structured format

forms.inputs.structured_format

When a strict syntax is required, put that structure into the control (segmented fields or visible separators) instead of a blank box.

Description

When a strict syntax is required, put that structure into the control — segmented fields or visible separators — instead of a blank box. Pass when strict-syntax values use those structures; fail when strict syntax is a blank box plus after-the-fact format errors only. Structure in the control guides correct entry before submit fails on format.

When to use

Values that require a strict syntax users must get right.

Not when

Forgiving-format fields that accept multiple recognizable shapes.

Agent hint

Use segmented fields or visible separators for strict-syntax values.

Pass

Strict-syntax values use segmented fields or visible separators.

Fail

Strict syntax is a blank box plus after-the-fact format errors only.

Citations

Designing Interfaces 3e ch. Getting Input — Structured Format (Tidwell, Brewer, Valencia)

https://www.oreilly.com/library/view/designing-interfaces-3rd/9781492051954/