# Re: caching

Michael Mealling (ccoprmm@oit.gatech.edu)
Fri, 18 Feb 94 21:01:07 EST

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    From: ccoprmm@oit.gatech.edu (Michael Mealling)

    Message-Id: <199402190201.AA29031@oit.gatech.edu>

    Subject: Re: caching

    To: atotic@ncsa.uiuc.edu (Alexsander Totic)

    Date: Fri, 18 Feb 94 21:01:07 EST

    In-Reply-To: <9402181639.AA15570@void.ncsa.uiuc.edu>; from "Alexsander Totic" at Feb 18, 94 10:39 am

Alexsander Totic said this:
> 2) Browsing. I am using a WWW paradigm here.

Just to illustrate how I see things wrt URCs I'm going to change this
illustration slightly:

/URC+format\
user clicks on a link->URN->|URC+format|->user/client picks one->doc
\URC+format/

> In this scenario, user is interested in few things: he should
> be able to display the document, and speed, speed, speed.
> I beleive that client should be able to make a choice for the
> user about what URL should be retreived, because naive user does not
> have the knowledge needed to make the right decision (he does not
> know the network topology and addressing very well). If the user
> is interested in finding more about the resource, he can get
> the URC, and find more info.

But, when the URN is resolved and we get back a URC instead of just a URL
we get several important things:

1) link information (e.g. size, format, etc....)
2) TTL
3) x numbers of URLs so we can make a choice as to the URL.

I don't think we're saying anything different because in that illustration
what you have listed as several URLs is what I call a URC.

I'm thinking more and more that URN->URL resolving should be
URN->URC resolving...

-MM

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