---
title: "single · RUAL Documentation"
description: "RUAL field validation block."
canonical: https://docs.rual.nl/block-types/field validation/fieldvalidation_get_single
language: en
---

# single

This block is part of the [`field validation`](https://docs.rual.nl/block-types/field%20validation) group and was last modified in core [`v10.4.28`](https://docs.rual.nl/core-versions/100428).

- fieldvalidation `fieldvalidation`

A typical wiring for [single](https://docs.rual.nl/block-types/field%20validation/fieldvalidation_get_single): the `fieldvalidation` out pin feeds [radio](https://docs.rual.nl/block-types/Component%20UI/component_radio).

![Studio canvas example for the single block: typical wiring for single.](https://docs.rual.nl/canvas-examples/fieldvalidation_get_single.png)

### Version history

Introduced in [`v10.4.28`](https://docs.rual.nl/core-versions/100428).