(last updated 2012-09-23) Resource Identifier (RI) Scheme name: sgn Status: provisional Scheme syntax: example: sgn://social-network.example.com/?ident=bob Scheme semantics: Social Graph Node Mapper Encoding considerations: Unknown, use with care. Applications/protocols that use this scheme name: See official documentation from sgnodemapper project. Interoperability considerations: Unknown, use with care. May be unsuitable for open use on the public internet. Security considerations: Unknown, use with care. Contact: Registering party: Dave Thaler Scheme creator: Google Author/Change controller: Either the registering party or someone who is verified to represent the scheme creator. See previous answer. References: http://code.google.com/p/google-sgnodemapper/   (file created 2012-09-23)