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All headers are String types. If a header value is missing its value is null.

Dependencies

To use HL7 in your camel routes you need to add the a dependency on camel-hl7 which implements this data format.

If you use maven you could just add the following to your pom.xml, substituting the version number for the latest & greatest release (see the download page for the latest versions).

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-hl7</artifactId>
  <version>1.5.0</version>
</dependency>