<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On 15-Jan-07, at 3:17 PM, Bob Wyman wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite">On 1/15/07, <B class="gmail_sendername">Dick Hardt</B> <<A href="mailto:dick@sxip.com">dick@sxip.com</A>> wrote:<DIV><SPAN class="gmail_quote"></SPAN><DIV>> From threads on the ID Gang list, it would seem you are<BR> > supportive of the URL based attribute schema approach.<BR>Errrrr... We're not supposed to mention discussions on the ID Gang List off-list... :-) <BR></DIV></DIV></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><DIV>My apologies if there was too much disclosure in my email.</DIV><BR><BLOCKQUOTE type="cite"><DIV><DIV>But, in any case, *yes* I am very supportive of the general concept of URL based attributes and fine-grained attribute exchange between applications based on mechanisms which allow the expression of semantic and syntactical relationships between attributes. <BR><BR>I am, however, somewhat concerned that something which should be a general technique is being defined as an "identity-specific" method.</DIV></DIV></BLOCKQUOTE><BR></DIV><DIV>We need a global mechanism for an RP to request an attribute from an OP that the RP has never communicated with before and that the RP gets the attribute (user permitting) requested. Agreed a mechanism for the expression of semantic and syntactic relationships is interesting in general, I would be happy with some simple semantics and syntactics of the attribute itself as a starting point so that we can solve real problems that we have today. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Is there a fatal flaw with the approach?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Is there related work going on somewhere else that we should be taking advantage of?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>btw: I am referring to Attribute Exchange, not to be confused with Martin's OpenID Exchange proposal.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>-- Dick</DIV></BODY></HTML>