MIME (Multipurpose Internet Mail Extensions) is an IETF specification for formatting and identifying data so that it can be sent over an IP network. Within NG9-1-1 it is primarily used within SIP messages.
Relevant NENA Documents
Note: To find and download the document, copy the document number (like NENA-STA-010) from below and search the NENA Standards and Documents page.
NENA-STA-010, NENA i3 Standard for Next Generation 9-1-1