Stanza Headers and Internet Metadata
Peter Saint-Andre, Joe Hildebrand · 2006
This specification defines an XMPP protocol extension for representing non-address-related headers in an XML format that is appropriate for use in XMPP. While the protocol provides a flexible mechanism for representing many kinds of standard Internet metadata, a registry of values is defined to structure the possible range of headers, and the inital registration includes headers from email, HTTP, MIME, and SIP.