Re: An object-oriented network DBMS from relational DBMS point of view
Date: Tue, 13 Mar 2007 17:23:30 +0100
> On 12 Mar 2007 10:43:17 -0700, "Dmitry Shuklin" <shuklin_at_bk.ru> wrote:
>>> That's not news, that an unconstrained description has constrained >>> grammers as a subset, that type 0 grammar has type 1,2,3 grammars as >>> "special cases", but the general case does not have some of the >>> properties of its simplified, special cases. >> Agree. But if some system allows to implement type 0 grammar then also >> it allow implement constrants and emulate type 1,2,3 grammars but not >> vice versa.
> Well, I don't know.
> The value of an RDBMS is that it holds ALL the data.
Any system exists in some *context* (meta level, environment etc.) which influences in one or another way its behavior and semantics. So it is not possible to hold ALL the data independent of what kind of DBMS you use.Received on Tue Mar 13 2007 - 17:23:30 CET