[OpenID] What is a URL, exactly?

thayes0993 at aol.com thayes0993 at aol.com
Tue Feb 13 00:22:00 UTC 2007

 I believe the short answer is: OpenID requires a way to resolve the "identifier" into a provider and an optional delegated identifier to use at that provider.
 The OpenID spec defines "identifier" as http/https URI or XRI because those are the two forms that have such a method defined in the spec. As you can see from other traffic on this list, there is at least one proposal being circulated for defining a method for email addresses.
 -----Original Message-----
 From: robyates70 at gmail.com
 To: joaquin at netmesh.us
 Cc: general at openid.net
 Sent: Mon, 12 Feb 2007 4:02 PM
 Subject: Re: [OpenID] What is a URL, exactly?
  On 2/12/07, Joaquin Miller <joaquin at netmesh.us> wrote:
>  So:  The URI, ' mailto:joaquin at netmesh.us', i s   a URL.
>  Fire away!

k :), so why does openid 2.0 not allow ' mailto:joaquin at netmesh.us' to
be an "identifier" and why does it also redefine "identifier" as

"An Identifier is either a "http" or "https" URI, (commonly referred
to as a "URL" within this document), or an XRI (Reed, D. and D.
McAlpin, "Extensible Resource Identifier (XRI) Syntax V2.0," .)

when RFC 3986 has a perfectly good definition for "identifier" that
the rest of the internet manages to get by with :) i.e.

"An identifier embodies the information required to distinguish what
is being identified from all other things within its scope of
identification.  ......."

It seems strange, to me, that openid 2.0 restricts identifiers to a
specific subset of URIs, i.e. http, https and xri. Why is this?

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