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Date: Mon, 21 Jan 2013 12:39:18 +0000
Subject: Re: Uniquely identifying each & every html template
From: Oscar Benjamin <oscar.j.benjamin@gmail.com>
To: Ferrous Cranus <nikos.gr33k@gmail.com>
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Xref: csiph.com comp.lang.python:37185

On 21 January 2013 12:06, Ferrous Cranus <nikos.gr33k@gmail.com> wrote:
> =D4=E7 =C4=E5=F5=F4=DD=F1=E1, 21 =C9=E1=ED=EF=F5=E1=F1=DF=EF=F5 2013 11:3=
1:24 =F0.=EC. UTC+2, =EF =F7=F1=DE=F3=F4=E7=F2 Chris Angelico =DD=E3=F1=E1=
=F8=E5:
>>
>> Seriously, you're asking for something that's beyond the power of
>> humans or computers. You want to identify that something's the same
>> file, without tracking the change or having any identifiable tag.
>>
>> That's a fundamentally impossible task.
>
> No, it is difficult but not impossible.
> It just cannot be done by tagging the file by:
>
> 1. filename
> 2. filepath
> 3. hash (math algorithm producing a string based on the file's contents)
>
> We need another way to identify the file WITHOUT using the above attribut=
es.

This is a very old problem (still unsolved I believe):
http://en.wikipedia.org/wiki/Ship_of_Theseus


Oscar