A new Request for Comments is now available in online RFC libraries. RFC 8262 Title: Content-ID Header Field in the Session Initiation Protocol (SIP) Author: C. Holmberg, I. Sedlacek Status: Standards Track Stream: IETF Date: October 2017 Mailbox: christer.holmberg@ericsson.com, ivo.sedlacek@ericsson.com Pages: 14 Characters: 26427 Updates: RFC 5621, RFC 5368, RFC 6442 I-D Tag: draft-ietf-sipcore-content-id-10.txt URL: https://www.rfc-editor.org/info/rfc8262 DOI: 10.17487/RFC8262 This document specifies the Content-ID header field for usage in the Session Initiation Protocol (SIP). This document also updates RFC 5621, which only allows a Content-ID URL to reference a body part that is part of a multipart message-body. This update enables a Content-ID URL to reference a complete message-body and metadata provided by some additional SIP header fields. This document updates RFC 5368 and RFC 6442 by clarifying their usage of the SIP Content-ID header field. This document is a product of the Session Initiation Protocol Core Working Group of the IETF. This is now a Proposed Standard. STANDARDS TRACK: This document specifies an Internet Standards Track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the Official Internet Protocol Standards (https://www.rfc-editor.org/standards) for the standardization state and status of this protocol. Distribution of this memo is unlimited. This announcement is sent to the IETF-Announce and rfc-dist lists. To subscribe or unsubscribe, see https://www.ietf.org/mailman/listinfo/ietf-announce https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist For searching the RFC series, see https://www.rfc-editor.org/search For downloading RFCs, see https://www.rfc-editor.org/retrieve/bulk Requests for special distribution should be addressed to either the author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless specifically noted otherwise on the RFC itself, all RFCs are for unlimited distribution. The RFC Editor Team Association Management Solutions, LLC