<span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">When I spoke about cacheing in point no (2) I clearly mentioned '<span style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">Applications "IN THE KNOW OF XRD's"'. So I am talking cacheing about of XRD's by applications who are aware of XRD's, which is more than the general cacheing of XRD's, like any other file you are talking about. And if i am still not clear to you, what I am suggesting is that XRD's will be used as something like hcard's, and they will cache'd in that context.</span></span><br>
<br><div class="gmail_quote">On Wed, Oct 21, 2009 at 9:45 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;">
No, there are no differences. Caching by the Subject is the wrong<br>
thing. If you are starting the discovery from a resource different<br>
from the Subject, then caching by the Subject will not actually save<br>
you network fetches. Anyway, that is not how HTTP caching works,<br>
caching is based on where you got the resource from, not on some clue<br>
embedded in the document.<br>
<br>
Basically, for this to work with existing cache infrastructure, cache<br>
should work at the HTTP layer, and validation or trust reasoning be<br>
performed at a higher (XRD-knowledgeable) level.<br>
<div><div></div><div class="h5"><br>
On Wed, Oct 21, 2009 at 9:07 AM, Santosh Rajan <<a href="mailto:santrajan@gmail.com">santrajan@gmail.com</a>> wrote:<br>
> Comparing robots.txt with an XRD is like comparing "apples with oranges".<br>
> Can you do better than that? Cacheing robots.txt is not the same as cacheing<br>
> an XRD. I will explain.<br>
> If my browser wants to cache all my XRD's. This is a real possibility. I may<br>
> have XRD's at Google, Yahoo, Microsoft and "my own" host. The only way you<br>
> can differentiate between all these XRD's is if the XRD;'s have a <Subject>.<br>
><br>
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--Breno<br>
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</font></blockquote></div><br><br clear="all"><br>-- <br><a href="http://hi.im/santosh">http://hi.im/santosh</a><br><br><br>