Re: One-To-One Relationships

Jan Hidders <hidders_at_gmail.com> wrote in news:7114bf62-b7a6-4b8b-a515-dafc0f24fe62_at_l16g2000hsf.googlegroups.com:

> Ah, yes, and as we all know, if two concepts have overlap then they
> are actually the same. *sigh* The distinction between entities /
> relationships, domain objects / predicates is pretty well-established
> in linguistics, philosophy and logic. First-order logic, you may have
> heard of it, separates them even strictly.

Is that so ? What is 'entity' and 'domain object' in the first order logic ? Care to provide a definition and a reference to reputable source of such definition?

>
> -- Jan Hidders
Received on Sun Dec 02 2007 - 05:37:55 CET