What makes D, D?

[Sean Kelly]

== Quote from Dimitar Kolev (DimitarRosenovKolev at hotmail.com)'s article
> Hello my questio is:
> What makes D, D?
> For example:
> There are more than one compiler for D, so what makes that interpretation of D, D?
> Didn't the implementers of that compiler change and add additional features to the language?
> Maybe I am missing the point, so please elaborate in either case.
> I am new to the D community (hope this is suficient as an excuse for my lack of knowledge :)).

Compiler writers are free to add features so long as they're compatible with
the base language--just look at Microsoft's C++ compiler.  What makes a D
compiler a D compiler is that it conforms to the D language spec.