Substitution (aka aliases)

[Sahoo]

On Tuesday 17 April 2012 06:43 AM, David Holmes wrote:
> On 13/04/2012 4:47 AM, Alan Bateman wrote:
>> Otherwise I think this is good. As you noted, the main open question
>> here is whether aliases should have version numbers.
>
> I would think they must have version numbers. If there are modules m at 1 
> and m at 2 with different APIs then saying "provides m" is meaningless.
>
If aliases don't have independent version numbers, what value does an 
alias bring to the table which a *view* doesn't?

Sahoo