The same XRD with a unique <Subject> is independant of the "large number of URL's" that is presumably pointing to it. If you are talking about delegation I don't know how this relates to cacheing. Can you give a real world example?<div>
<br><div class="gmail_quote">On Wed, Oct 21, 2009 at 10:12 PM, Breno de Medeiros <span dir="ltr"><<a href="mailto:breno@google.com">breno@google.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Considering the following use case: the same XRD, stored at the same<br>
location, is used by a large number of URLs. The developers can't<br>
include 1000's of Aliases in the document. If this is not security<br>
sensitive, they can simply create an XRD without Subject.<br>
<br>
The current model for XRD would allow it to be used this way, and<br>
caching would just work. Adding a Subject would break both caching and<br>
likely preventing this to work at all.<br>
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