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https://issues.apache.org/jira/browse/CAMEL-3564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12984258#action_12984258
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Madhav Bhargava commented on CAMEL-3564:
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Hi Claus,

This feature is required for <camel:setHeader> as well.

Best Regards,
Madhav

> RefLanguage - To be able to refer to something from the registry
> ----------------------------------------------------------------
>
>                 Key: CAMEL-3564
>                 URL: https://issues.apache.org/jira/browse/CAMEL-3564
>             Project: Camel
>          Issue Type: New Feature
>          Components: camel-core, camel-spring
>    Affects Versions: 2.5.0
>            Reporter: Claus Ibsen
>            Priority: Minor
>             Fix For: 2.7.0
>
>
> See nabble
> http://camel.465427.n5.nabble.com/Set-exchange-property-to-a-Map-tp3349171p3349171.html
> This is needed for folks using XML routing. An expression which can refer to 
> something from the registry.
> We can also add a {{ref}} function to the simple language so you can use that 
> as well.
> In simple the function should be {{ref:id}} where id is the id to lookup.
> For example
> {code:xml}
> <bean id="foo" class=...>
>    <!-- options -->
> </bean>
> <setProperty name="myFoo">
> <ref id="foo"/>
> </setProperty>
> {code}
> And when using simple
> {code:xml}
> <setProperty name="myFoo">
> <simple>${ref:foo}</simple>
> </setProperty>
> {code}

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