X-XRDS-Location

<meta http-equiv="X-XRDS-Location"

content="http://example.com/yadis.xml">

application/xrds+xml

<?xml version="1.0" encoding="UTF-8"?><xrds:XRDS xmlns:xrds="xri://$xrds" xmlns:openid="http://openid.net/xmlns/1.0" xmlns="xri://$xrd*($v*2.0)"> <XRD version="2.0"> <Service priority="0"> <Type>http://specs.openid.net/auth/2.0/signon</Type> <Type>http://openid.net/sreg/1.0</Type> <Type>http://openid.net/extensions/sreg/1.1</Type> <Type>http://schemas.openid.net/pape/policies/2007/06/phishing-resistant</Type> <Type>http://openid.net/srv/ax/1.0</Type> <URI>http://www.myopenid.com/server</URI> <LocalID>http://walkah.myopenid.com/</LocalID> </Service> </XRD></xrds:XRDS>

http://hueniverse.com/2009/02/redefining-discovery/

http://hueniverse.com/2009/11/the-discovery-protocol-stack-redux/

http://tools.ietf.org/search/draft-hammer-discovery-04

<?xml version='1.0' encoding='UTF-8'?><XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0' xmlns:hm='http://host-meta.net/xrd/1.0'> <hm:Host xmlns='http://host-meta.net/xrd/1.0'>gmail.com</hm:Host> <Link rel='lrdd' template='http://www.google.com/s2/webfinger/?q={uri}'> <Title>Resource Descriptor</Title> </Link></XRD>

<?xml version='1.0'?><XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0'> <Subject>acct:walkah@gmail.com</Subject> <Alias>http://www.google.com/profiles/walkah</Alias> <Link rel='http://portablecontacts.net/spec/1.0' href='http://www-opensocial.googleusercontent.com/api/people/'/> <Link rel='http://microformats.org/profile/hcard' href='http://www.google.com/profiles/walkah' type='text/html'/> <Link rel='http://specs.openid.net/auth/2.0/provider' href='http://www.google.com/profiles/walkah'/> <Link rel='describedby' type='text/html' href='http://www.google.com/profiles/walkah'/> <Link rel='describedby' type='application/rdf+xml' href='http://s2.googleusercontent.com/webfinger/?q=acct%3Awalkah%40gmail.com&amp;fmt=foaf' /> <Link rel='http://schemas.google.com/g/2010#updates-from' href='http://buzz.googleapis.com/feeds/104170607635011952825/public/posted' type='application/atom+xml'/></XRD>

http://hueniverse.com/2009/08/making-the-case-for-a-new-acct-uri-scheme/hW* n

http://code.google.com/p/webfinger/

acct:user@example.comexample.com

http://hueniverse.com/discovery/

http://walkah.net/R�@M��