Re: Identity modelling
From: Marshall Spight <marshall.spight_at_gmail.com>
Date: 31 Aug 2005 07:44:00 -0700
Message-ID: <1125499440.944174.296010_at_g14g2000cwa.googlegroups.com>
Date: 31 Aug 2005 07:44:00 -0700
Message-ID: <1125499440.944174.296010_at_g14g2000cwa.googlegroups.com>
David Cressey wrote:
>
> For example:
>
> If I move an html file from one directory to another on the same disk, have
> I changed its identity? Have I changed its URL? The answer to the second
> question is clearly yes. A hyperlink bound to the old URL will now return
> "Page not found".
> But the question about whether I've changed its identity by moving it is a
> more subtle one.
This example exactly illustrates the difference between location-based addressing and content based addressing. Note that when you move the html file, the location changes but the content does not.
Marshall Received on Wed Aug 31 2005 - 16:44:00 CEST