Re: One-To-One Relationships

On 30 nov, 19:03, Tegiri Nenashi <TegiriNena..._at_gmail.com> wrote:
> On Nov 30, 8:19 am, Jan Hidders <hidd..._at_gmail.com> wrote:
> The distinction between entities /
>
> > relationships, domain objects / predicates is pretty well-established
> > in linguistics, philosophy and logic.
>
> That certainly means you can define them formally in database terms,
> right?

Not really. In database terms you can define how it is represented, but not what it is that is being represented.

> Here is one such attempt:http://arxiv.org/PS_cache/arxiv/pdf/0710/0710.2083v1.pdf
> It defines an entity as a relation (aka table:-) with a single
> noncomposite key, and relationship as a table with composite key. Does
> this definition pretty much exhausts the entity-relationship theory?

Certainly not. Datamining is about finding likely candidates in a quick way. It is not necessarily about being exhaustive or giving a full definition of what you are looking for.

• Jan Hidders