Re: Relation Definition

From: Jan Hidders <jan.hidders_at_REMOVETHIS.pandora.be>
Date: Tue, 22 Feb 2005 20:13:03 GMT
Message-ID: <jnMSd.18496$Qp7.2127053@phobos.telenet-ops.be>

Anith Sen wrote:

>>>No, that cannot be right because it would allow the same attribute name 
>>>to appear more than once.

>
> Why so? The header is a set -- so the elements i.e. the named typed
> attributes in a set are unique.

You defined them as pairs and in a set there can be two pairs with the same first component.

>>>http://mathworld.wolfram.com/n-Tuple.html

>
> That provides a possible vector interpretation of an n-Tuple.

It is not "an interpretation", it is the standard definition of a tuple as used by mathematicians.

• Jan Hidders

Received on Tue Feb 22 2005 - 14:13:03 CST