> For the complete documentation index, see [llms.txt](https://boxlang.ortusbooks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/xml/xmlvalidate.md).

# XMLValidate

Uses a Document Type Definition (DTD) or XML Schema to validate an XML text document or an XML document object.

Returns keys status (boolean), errors (array), fatalerrors (array) and warnings (array)

## Method Signature

```
XMLValidate(XML=[any], validator=[string])
```

### Arguments

| Argument    | Type     | Required | Description                                                                                                        | Default |
| ----------- | -------- | -------- | ------------------------------------------------------------------------------------------------------------------ | ------- |
| `XML`       | `any`    | `true`   | The XML text document or XML document object to validate.                                                          |         |
| `validator` | `string` | `false`  | The DTD or XML Schema to use for validation. If not provided, the DTD declaration within the XML document is used. |         |

## Examples

### Validate against an XML Schema

Validates that note.xml is valid according to the schema note.xsd.

[Run Example](https://try.boxlang.io/?code=eJyryM0JS8zJTEksSdVQUMooKSkottLXLy8v1ys3Lk7OyM%2FPKdZLzs%2FVr8jN0c%2FLL0nVAzKUdIhTWZyipKCpFxziGBIabM0FAPhjJN4%3D)

```java
xmlValidate( "https://www.w3schools.com/xml/note.xml", "https://www.w3schools.com/xml/note.xsd" ).STATUS;

```

Result: false

### Additional Examples

```java
validator = "
		<?xml version=""1.0""?>
		<xs:schema xmlns:xs=""http://www.w3.org/2001/XMLSchema"">
			<xs:element name=""note"">
				<xs:complexType>
					<xs:sequence>
						<xs:element name=""to"" type=""xs:string""/>
						<xs:element name=""from"" type=""xs:string""/>
						<xs:element name=""heading"" type=""xs:string""/>
						<xs:element name=""body"" type=""xs:string""/>
					</xs:sequence>
				</xs:complexType>
			</xs:element>
		</xs:schema>
		";
xml_stream = "
			<?xml version=""1.0"" encoding=""UTF-8""?>
			<note>
				<to>Alice</to>
				<from>Bob</from>
				<heading>Reminder</heading>
				<body>Here is the message you requested.</body>
			</note>";
xml_document = XmlParse( xml_stream );
dump( xmlValidate( xml_document, validator ) );

```

## Related

* [XMLChildPos](/boxlang-language/reference/built-in-functions/xml/xmlchildpos.md)
* [XMLElemNew](/boxlang-language/reference/built-in-functions/xml/xmlelemnew.md)
* [XMLFormat](/boxlang-language/reference/built-in-functions/xml/xmlformat.md)
* [XMLGetNodeType](/boxlang-language/reference/built-in-functions/xml/xmlgetnodetype.md)
* [XMLNew](/boxlang-language/reference/built-in-functions/xml/xmlnew.md)
* [XMLParse](/boxlang-language/reference/built-in-functions/xml/xmlparse.md)
* [XMLSearch](/boxlang-language/reference/built-in-functions/xml/xmlsearch.md)
* [XMLTransform](/boxlang-language/reference/built-in-functions/xml/xmltransform.md)


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