Re: Float to String

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Wed, 10 Nov 2004 17:28:55 +0000, Marius Amado Alves wrote:

>> So the second question: do you have have ADT in your database?
> 
> In one word, no. In more words: Mneson supports ADT through its graph 
> data model. Arbitrarily complex data structures are represented by 
> graphs. Vertices are either basic values (integer, real, string) or 
> valueless. Links are directed and untyped (unlabelled) at the base 
> level. Support to represent complex structures including typed links 
> exist. ADTs can be build on top of this level.

So it is kind of PL/1, pre Ada 83. You have elementary types and you can
compose structures out of them. The problem of all such approaches it that
the representation becomes fixed. When you compose a new type you define
both its representation and interface. This cannot be portable. In Ada
terms:

type My_Integer is new Integer;
   -- My_Integer is built upon Integer. This cannot be portable.
   -- Or else one should go the Integer-N way. This cure is
   -- worse than the disease.

type My_Integer is range ..;
   -- This is portable, but does not fit in your model

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de