(last updated 2012-09-12) Resource Identifier (RI) Scheme name: msnim Status: provisional Scheme syntax: Add a contact to the buddy list: msnim:add?contact=nada&example.com Start a conversation with a contact: msnim:chat?contact=nada&example.com Start a voice conversation with a contact: msnim:voice?contact=nada&example.com Start a video conversation with a contact: msnim:video?contact=nada&example.com Scheme semantics: Adding a contact, or starting a conversation in Windows Live Messenger Encoding considerations: Unknown, use with care. Applications/protocols that use this scheme name: Can be invoked from a web page or via a run command or an Internet Explorer browser URL (won't work with Firefox 2.0.0.8). For web pages use this HTML: Click to chat! Interoperability considerations: Unknown, use with care. Security considerations: Unknown, use with care. Contact: Registering party: Alexey Melnikov Scheme creator: Microsoft Author/Change controller: Either the registering party or someone who is verified to represent the scheme creator. See previous answer. References: http://en.wikipedia.org/wiki/Windows_Live_Messenger (file created 2012-09-12)