Extensible Markup Language (XML) Format Extension for Representing

The IESG announced that members of the IETF Session Initiation Proposal
Investigation (SIPPING) Working Group have released a candidate Proposed
Standard draft of "Extensible Markup Language (XML) Format Extension
for Representing Copy Control Attributes in Resource Lists." The IESG
plans to make a decision in the next few weeks, and solicits final
comments on this action. In certain types of multimedia communications,
a Session Initiation Protocol (SIP) request is distributed to a group
of SIP User Agents (UAs). The sender sends a single SIP request to a
server which further distributes the request to the group. This SIP
request contains a list of Uniform Resource Identifiers (URIs), which
identify the recipients of the SIP request. This URI-list is expressed
as a resource list XML document. This specification defines an XML
extension to the XML resource list format that allows the sender of
the request to qualify a recipient with a copy control level similar
to the copy control level of existing e-mail systems. It provides an
extension that enables the sender to supply a copy control attribute
that labels each recipient as a "to", "cc", or "bcc" recipient. This
attribute indicates whether the recipient is receiving a primary copy
of the SIP request, a carbon copy, or a blind carbon copy. Additionally,
we provide the sender with the capability of indicating in the URI-list
that one or more resources should be anonymized, so that some
recipients' URIs are not disclosed to the other recipients. Instead,
these URIs are replaced with anonymous URIs.