# Validation

## Validation Component

The Validation component performs XML validation of the message body using the JAXP Validation API and based on any of the supported XML schema languages, which defaults to XML Schema

Note that the Jing component also supports the following useful schema languages:

- RelaxNG Compact Syntax

- RelaxNG XML Syntax

The MSV component also supports RelaxNG XML Syntax.

## URI format

    validator:someLocalOrRemoteResource

Where someLocalOrRemoteResource is some URL to a local resource on the classpath or a full URL to a remote resource or resource on the file system which contains the XSD to validate against. For example:

- `msv:org/foo/bar.xsd`

- `msv:file:../foo/bar.xsd`

- `msv:http://acme.com/cheese.xsd`

- `validator:com/mypackage/myschema.xsd`

## Options

Option | Default | Description
--- | --- | ---
`resourceResolver` | `null` | Apache Camel 2.9: Specifies a reference to an `org.w3c.dom.ls.LSResourceResolver` in the Camel Registry.
`useDom` | `false` | Apache Camel 2.0: Whether `DOMSource`/{{DOMResult}} or `SaxSource`/{{SaxResult}} should be used by the validator.
`useSharedSchema` | `true` | Apache Camel 2.3: Whether the `Schema` instance should be shared or not. This option is introduced to work around a JDK 1.6.x bug. Xerces should not have this issue.
`failIfNoBody` | `true` | Apache Camel 2.9.5, 2.10.3: Specifies whether to fail when no body exists.

## Example

The following example shows how to configure a route from endpoint direct:start which then goes to one of two endpoints, either mock:valid or mock:invalid based on whether or not the XML matches the given schema (which is supplied on the classpath).

    <camelContext xmlns="http://camel.apache.org/schema/spring">
        <route>
            <from uri="direct:start"/>
            <doTry>
                <to uri="validator:org/apache/camel/component/validator/schema.xsd"/>
                <to uri="mock:valid"/>
                <doCatch>
                    <exception>org.apache.camel.ValidationException</exception>
                    <to uri="mock:invalid"/>
                </doCatch>
                <doFinally>
                    <to uri="mock:finally"/>
                </doFinally>
            </doTry>
        </route>
    </camelContext>