* @field fileId: the id of the file to be distributed. It shall be set to the output of the SHA-256 hash function calculated on the transmitted CTL or file content.
*
* @field fileDescription: the file description or metadata of the segmented file.
* For instance, metadata could contain parameters required when coding scheme using a FEC encoding is used (cf. IETF RFC 6726)
* In the current version of this standard, the fileDescription shall be of 0 byte length.
*
* @field segmentContent : contains the segmented data of the message or file.