Oracle Mediator automatically propagates attachments to target receivers for Oracle Mediator components that are pass through (that is, they do not contain a transformation or assign rule), and it does not propagate attachments for Oracle Mediator components that are not pass through. The passThroughAttachment property lets you override the pass through settings just for attachments. Setting this property to true copies all attachments to the target receiver implicitly.

Use this property to propagate attachments when the Oracle Mediator component is not a pass through, or use it to block attachments when the Oracle Mediator component is pass through. To implement the pass through attachment override, add the property to the project's composite.xml file in the component element for the Oracle Mediator component. Set the property to true to override an Oracle Mediator component that is not pass through. Set it to false to override a pass through component. The following example provides details:

<component name="Mediator">
    <implementation.mediator src="Mediator.mplan"/>
    <property name="passThroughAttachment">true</property>
</component>