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The The Validate Mediator is used for schema validation of messages. A selected part of an XML message is validated  validates XML messages against a specified schema. This mediator can be extended by adding properties to enable/disable specific features of the validation engineYou can specify an XPath to extract and validate a specific part of the message. Otherwise, the mediator validates the first child of the SOAP body of the current message.

Tip

A Fault Mediator should be added as a child to the Validate mediator in order specify the fault sequence to be followed if the validation fails.

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Parameter NameDescription
Schema keys defined for Validate Mediator table

This parameter is used to specify the The key for the schema location. It can be specified using one of the following methods.

  • If the key is a static value, select Static Key from the list and enter a static key in the data field. This value should be pre-defined and saved as a resource in the Registry. Click either Configuration Registry or Governance Registry as relevant to select the required key from the resource tree.
  • If the key is a dynamic value, Select Dynamic Key from the list and enter an expression to calculate the value in the data field.

Click Add Key to add a new schema key. Click Delete in the relevant row to delete a schema key.

Info
titleTip

You can click NameSpaces to add namespaces if you are providing an expression. Then the Namespace Editor panel would appear where you can provide any number of namespace prefixes and URLs used in the XPath expression. 

Source

The XPath expression to extract the XML that needs to be validated. The Validate mediator validates the evaluation of this expression is validated against the schema specified in the Schema keys defined for Validate Mediator table. If this is not specified, the validation is performed against the first child of the SOAP body of the current message.

Info
titleTip

You can click NameSpaces to add namespaces if you are providing an expression. Then the Namespace Editor panel would appear where you can provide any number of namespace prefixes and URLs used in the XPath expression. 

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Parameter NameDescription
Feature NameThe name of the feature.
ValueThis parameter is used to specify whether the feature should be enabled or not. Click True to enable and Click True to enable the feature, or click False to disable the feature.
ActionClick Delete in the relevant row to delete a feature.

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In this example, the required schema for validating messages going through the validate mediator is given as a registry key, schema\sample.xsd. No source attribute is specified, and therefore the schema will be used to validate the first child of the SOAP body. The mediation logic to follow if the validation fails is defined within the on-fail element. In this example, the Fault Mediator is used to create  creates a SOAP fault to be sent back to the party which sent the message.

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