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Namespaces ns = new Namespaces("c", "http://acme.com/cheese");

from("direct:start").filter().
    xpath("/c:person[@name='James']", ns).
    to("mock:result");

Variables

Variables in XPath is defined in different namespaces. The default namespace is http://activemq.apache.org/camel/schema/springImage Added.

Namespace URI	Local part	Type	Description
http://camel.apache.org/xml/in/Image Added	in	Message	the exchange.in message
http://camel.apache.org/xml/out/Image Added	out	Message	the exchange.out message
http://camel.apache.org/xml/variables/environment-variablesImage Added	env	Object	OS environment variables
http://camel.apache.org/xml/variables/system-propertiesImage Added	system	Object	Java System properties
http://camel.apache.org/xml/variables/exchange-propertyImage Added		Object	the exchange property

Camel will resolve variables according to either:

• namespace given
• no namespace given

Namespace given

If the namespace is given then Camel is instructed exactly what to return. However when resolving either in or out Camel will try to resolve a header with the given local part first, and return it. If the local part has the value body then the body is returned instead.

No namespace given

If there is no namespace given then Camel resolves only based on the local part. Camel will try to resolve a variable in the following steps:

• from variables that has been set using the variable(name, value) fluent builder
• from message.in.header if there is a header with the given key
• from exchange.properties if there is a property with the given key

Functions

Camel adds the following XPath functions that can be used to access the exchange:

Using XML configuration

If you prefer to configure your routes in your Spring XML file then you can use XPath expressions as follows

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