Re: An object-oriented network DBMS from relational DBMS point of view

On 19 mar, 03:08, "Marshall" <marshall.spi..._at_gmail.com> wrote:

> In what way is that not well-defined? "A legal entity is either
> a person or a corporation." No problem.

It does not specify whether the instance is a value or a variable.

In the book, class is a kind of type, so object could mean value, but it also says:

"The reference values (often just references) are pointers to these objects"

You can not point to a value.

"A class instance is explicitly created by a class instance creation expression"

A class instance creation expression creates a variable. Values canīt be created.

So it is clear that some objets are variables, but what about the values
holded by the variables?

Alfredo Received on Mon Mar 19 2007 - 02:56:14 CDT