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Camel supports XQuery to allow an Expression or Predicate to be used in the DSL or Xml Configuration. For example you could use XQuery to create an Predicate in a Message Filter or as an Expression for a Recipient List.

From 1.3 of Camel onwards you can use XQuery expressions directly using smart completion in your IDE as follows

from("queue:foo").filter().
  xquery("//foo")).
  to("queue:bar")

In earlier versions of Camel you had to use theXQueryBuilder methods then you can use the xquery() method inside your rules.

import static org.apache.camel.builder.saxon.XQueryBuilder.*;
...
from("queue:foo").
  filter(xquery("//foo")).
  to("queue:bar")

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