In SAP Cloud Integration, the runtime message content, headers, and properties can be accessed using the Camel Simple Expression Language.
Examples:
${body} # Accesses the message payload.
${header.<headerName>} # Accesses message headers.
${property.<propertyName>} # Accesses integration properties.
Other options:
XML expression language # Not supported directly.
Spring expression language # Used in Spring apps, not in SAP CPI.
JavaScript expression language # Not used; JavaScript/Groovy scripts exist, but not for message expressions.
Thus, the correct language is Simple expression language.
