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Chapter 18. Header
Overview
The header language provides a convenient way of accessing header values in the current message. When you supply a header name, the header language performs a case-insensitive lookup and returns the corresponding header value.
				The header language is part of camel-core.
			
XML example
				For example, to resequence incoming exchanges according to the value of a SequenceNumber header (where the sequence number must be a positive integer), you can define a route as follows:
			
Java example
The same route can be defined in Java, as follows:
from("SourceURL")
  .resequence(header("SequenceNumber"))
  .to("TargetURL");
from("SourceURL")
  .resequence(header("SequenceNumber"))
  .to("TargetURL");