The mime code of the attached document.

Example value
text/csv
Code lists
Mime code (IANA Subset)
Rules
Identifier/Error message Flag
PEPPOL-EN16931-CL001
Mime code must be according to subset of IANA code list.
fatal
UBL-DT-06
[UBL-DT-06]-Binary object elements shall contain the mime code attribute
fatal
BR-CL-24
[BR-CL-24]-For Mime code in attribute use MIMEMediaType.
fatal