cid (Content Identifier)

cid (Content Identifier [Content‑ID]) is a unique identifier assigned to a body part that allows the body part to be referenced in a SIP header field.

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