Metafield definitions can have validation options. Validation options enable you to apply additional constraints to the data that a metafield can store, such as a minimum or maximum value, or a regular expression. The type of the metafield definition determines which validation options are available.

## How it works

You can include a validation option for a metafield definition using the validation `name` and a corresponding `value`. The appropriate value depends on the metafield type that the validation applies to. For more information about the supported formats and units of measurement available for each type, refer to [Metafield types](/docs/apps/build/custom-data/metafields/list-of-data-types).

## Supported validation options

The following table describes the validation options available for metafield definitions. Refer to the [examples](#examples) for validation option code snippets.

| Validation option | Description | Supported types | Use cases |
|---|---|---|---|
| [Minimum length](#minimum-length) | Sets the minimum length of a text value | <ul><li><code>single_line_text_field</code></li><li><code>multi_line_text_field</code></li></ul> | <ul><li>A blog summary needs to be at least 100 characters, so that it provides enough detail.</li><li>A value such as a zip code needs to have an exact character length, so set the minimum and maximum lengths to the same value.</li></ul> |
| [Maximum length](#maximum-length) | Sets the maximum length of a text value | <ul><li><code>single_line_text_field</code></li><li><code>multi_line_text_field</code></li></ul> | <ul><li>A blog summary or a product description needs to have a maximum length of 150 characters so that it fits in a designated area of your page.</li><li>A value such as a phone number needs to have an exact character length of ten, so set minimum length and maximum length to `10`. |
| [Regular expression](#regular-expression) | Sets a regular expression. Shopify supports [RE2](https://github.com/google/re2/wiki/Syntax). | <ul><li><code>single_line_text_field</code></li><li><code>multi_line_text_field</code></li></ul> | <ul><li>An email field requires an `@` symbol followed by a `.` and some text.</li><li>A serial number needs to start with a specific set of characters.</li></ul> |
| [Allowed domains](#allowed-domains) | A list of allowed domains. | `url` | <ul><li>Allow links to specific social media sites at the bottom of an article.</li><li>Allow links to other pages within your site for a list of similar products.</li></ul> |
| [Choices](#choices) | A list of up to 128 predefined options that limit the values allowed for the metafield.  | `single_line_text_field` | <ul><li>The flavor profile field for coffee products allows the following choices: Floral, Sweet, Nutty, and Other.</li><li>The field for sizing fits for a product allows the following choices: True to size, Runs large, Runs small.</li></ul> |
| [File type options](#file-type-options) | Sets a list of file type options. Leaving this empty allows all files, regardless of type.<br></br> Valid values: `Image`, `Video`. | `file_reference` | <ul><li>A file reference from a blog to an author photo needs to be to an image file type.</li><li>A file reference to a demonstration video in MP4 format.</li><li>A file reference from an order to product instructions in PDF format.</li></ul> |
| [Maximum precision](#maximum-precision) | Sets the maximum number of decimal places to store for a decimal number | `number_decimal` | <ul><li>A version number field needs to accept a number with one decimal place.</li><li>A specification field for a product needs to have a maximum of three decimal places.</li></ul> |
| [Minimum date](#minimum-date) | Sets the minimum date in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format | `date` | The date field for an expiry date or a product release needs to be after a specific date. |
| [Maximum date](#maximum-date) | Sets the maximum date in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format | `date` | The date for future product availability can't be later than a specific date.
| [Minimum datetime](#minimum-datetime) | Sets the minimum date and time in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format | `date_time` | A product release occurs on a specific date at midnight, and the product won't display before that date and time. |
| [Maximum datetime](#maximum-datetime) | Sets the maximum date and time in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format |  `date_time` | A customer loyalty reward expires on a specific date and time. The reward can't be used after that date and time. |
| [Minimum weight](#minimum-weight) | Sets the minimum weight | `weight`| A bundled product weight field needs to have a maximum allowed weight. |
| [Maximum weight](#maximum-weight) | Sets the maximum weight | `weight` | An order requires a minimum weight for shipping. |
| [Minimum volume](#minimum-volume) | Sets the minimum volume | `volume` | <ul><li>A product volume field needs to have a specific minimum volume.</li><li>A product needs to have an exact volume, so you set minimum volume and maximum volume to the same value.</li></ul> |
| [Maximum volume](#maximum-volume) | Sets the maximum volume | `volume` | <ul><li>A product volume field needs to have certain maximum volume.</li><li>A product needs to have an exact volume, so you set minimum volume and maximum volume to the same value.</li></ul> |
| [Minimum dimension](#minimum-dimension) | Sets the minimum dimension | `dimension` | A product needs to have a minimum length, width, or height. |
| [Maximum dimension](#maximum-dimension) | Sets the maximum dimension | `dimension` | A product needs to have a maximum length, width, or height. |
| [Minimum integer](#minimum-integer) | Sets the minimum integer number | `number_integer` | A product number needs to be within a specific range of numbers, so you set the minimum and maximum integer validations to create the range. |
| [Maximum integer](#maximum-integer) | Sets the maximum integer number | `number_integer` | A product number needs to be within a specific range of numbers, so you set the minimum and maximum integer validations to create the range. |
| [Minimum decimal](#minimum-decimal) | Sets the minimum decimal number | `number_decimal` | A product version field needs to accept a version number that's greater than a specific decimal number, such as `0.5`. |
| [Maximum decimal](#maximum-decimal) | Sets the maximum decimal number | `number_decimal` | A product version field needs to accept a version number that's less than a specific decimal number, such as `1.99`. |
| [Metaobject definition](#metaobject-definition) | Sets the metaobject definition that a reference must point to |  <ul><li>`metaobject_reference`</li><li>`list.metaobject_reference`</li></ul>| A product refers to a `Designer` metaobject. |
| [Multiple metaobject definitions](#multiple-metaobject-definitions) | Sets the permitted metaobject definitions that can be referred to | <ul><li>`mixed_reference`</li><li>`list.mixed_reference`</li></ul> | <ul><li>A product that references a list of different `Material` metaobjects.</li><li>A dynamic placeholder reference that can support a union set of metaobject definitions.</li></ul> |
| [JSON schema](#json-schema) | Sets the permitted JSON format. The [JSON schema](https://json-schema.org/learn/miscellaneous-examples.html) provides an example of a standard way to structure your JSON, and contains information about valid data types and the key descriptions. | `json` | Data from a 3rd-party app must match a specific JSON schema. |

## Examples

This section provides examples of each validation option.

### Minimum length

The following example validates the minimum length of a text value to eight characters.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "8"
</script>

</div>
</p>


### Maximum length

The following example validates the maximum length of a text value to 25 characters.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "25"
</script>

</div>
</p>


### Regular expression

The following example validates a regular expression that matches the pattern `(@)(.+)$`.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: regex,
  value: "(@)(.+)$"
</script>

</div>
</p>


### Allowed domains

The following example validates `shopify.com` against a list of allowed domains.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: allowed_domains,
  value: "[\"shopify.com\"]"
</script>

</div>
</p>


### Choices

The following example validates the values allowed for the metafield: `red`, `green`, `blue`.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: choices,
  value: "[\"red\", \"green\", \"blue\"]"
</script>

</div>
</p>


### File type options

The following example validates the allowed file type options: `Image`, `Video`.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: file_type_options,
  value:"[\"Image\",\"Video\"]"
</script>

</div>
</p>


### Maximum precision

The following example validates that the maximum number of decimal places to store for a floating-point number is two.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max_precision,
  value: "2"
</script>

</div>
</p>


### Minimum date

The following example validates the setting for the minimum date in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "2022-01-01"
</script>

</div>
</p>


### Maximum date

The following example validates the setting for the maximum date in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "2022-03-03"
</script>

</div>
</p>


### Minimum datetime

The following example validates the setting for the minimum date and time in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "2022-03-03T16:30:00"
</script>

</div>
</p>


### Maximum datetime

The following example validates the setting for the maximum date and time in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "2022-03-03T16:30:00"
</script>

</div>
</p>


### Minimum weight

The following example validates a setting for the minimum weight to be ten grams.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "{\"unit\":\"g\",\"value\":10}"
</script>

</div>
</p>


### Maximum weight

The following example validates a setting for the maximum weight to be 50 grams.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "{\"unit\":\"g\",\"value\":50}"
</script>

</div>
</p>


### Minimum volume

The following example validates a setting for the minimum volume to be five milliliters.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "{\"unit\":\"ml\",\"value\":5}"
</script>

</div>
</p>


### Maximum volume

The following example validates a setting for the maximum volume to be 50 milliliters.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "{\"unit\":\"ml\",\"value\":50}"
</script>

</div>
</p>


### Minimum dimension

The following example validates a setting for the minimum dimension to be five centimeters.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "{\"unit\":\"cm\",\"value\":5}"
</script>

</div>
</p>


### Maximum dimension

The following example validates a setting for the maximum dimension to be 50 centimeters.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "{\"unit\":\"cm\",\"value\":50}"
</script>

</div>
</p>


### Minimum integer

The following example validates a setting for the minimum integer number to be nine.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "9"
</script>

</div>
</p>


### Maximum integer

The following example validates a setting for the maximum integer number to be 15.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "15"
</script>

</div>
</p>


### Minimum decimal

The following example validates a setting for the minimum decimal number to be 0.5.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: min,
  value: "0.5"
</script>

</div>
</p>


### Maximum decimal

The following example validates a setting for the maximum decimal number to be 1.99.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: max,
  value: "1.99"
</script>

</div>
</p>


### Metaobject definition

The following example validates a setting for the metaobject definition that a reference must point to.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: metaobject_definition_id,
  value: "gid://shopify/MetaobjectDefinition/123"
</script>

</div>
</p>


### Multiple metaobject definitions

The following example validates a setting for the permitted metaobject definitions that can be referred to.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: metaobject_definition_ids,
  value: "[\"gid://shopify/MetaobjectDefinition/123\",\"gid://shopify/MetaobjectDefinition/456\"]"
</script>

</div>
</p>


### JSON schema

The following example validates a setting for the permitted JSON format.

<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>


<script type="text/plain" data-language="yml">
validations:
  name: schema,
  value: "{
    \"\$id\": \"https://example.com/person.schema.json\",
    \"\$schema\": \"https://json-schema.org/draft/2020-12/schema\",
    \"title\": \"Person\",
    \"type\": \"object\",
    \"properties\": {
        \"firstName\": {
            \"type\": \"string\",
            \"description\": \"The person's first name.\"
        },
        \"lastName\": {
            \"type\": \"string\",
            \"description\": \"The person's last name.\"
        },
        \"age\": {
            \"description\": \"Age in years >= 0.\",
            \"type\": \"integer\",
            \"minimum\": 0
        }
    }
}"
</script>

</div>
</p>


## Next steps

- Learn how to [manage metafield definitions](/docs/apps/build/custom-data/metafields/definitions) using the GraphQL Admin API.