The properties specified within the Header tag constitute the header of the JMS message. The header properties can include predefined system properties and user defined custom properties. In addition to the list of system properties provided by BP Server, user can define any custom property in header.
The default data-type for a property is assumed as java.lang.String type. If the property data-type is other than java.lang.String, then the type attribute should be specified with a proper value.