• To: "Jeff Lowery" <Jeff.Lowery@c...>,"Andrew Layman" <andrewl@m...>,<xml-dev@l...>
• Subject: RE: Some random noise on rational type systems for XML
• From: "Dare Obasanjo" <dareo@m...>
• Date: Tue, 6 May 2003 17:17:50 -0700
• Thread-index: AcMULX3KdPT+ld4HT6Kz/hBYMcqwKAAAAtKg
• Thread-topic: Some random noise on rational type systems for XML

> -----Original Message-----
> From: Jeff Lowery [mailto:Jeff.Lowery@c...] 
> Sent: Tuesday, May 06, 2003 5:09 PM
> To: Andrew Layman; xml-dev@l...

> > In XML there are three (not two) syntactic devices that 
> people have at 
> > various times asserted have some connection to the absence 
> of a tuple 
> > in the relational model.
> > 
> > XML has:
> > 	1.	Omission of an optional element.
> > 	2.	Presence of an element having the attribute xsi:nil
> > 	3.	Presence of an element having empty content.
> 
> I don't see how any of these three could be interpreted 
> differently if the element content is defined to represent a number.  

What if the element [or the tuple it maps to] has a default specified? 

-- 
PITHY WORDS OF WISDOM 
If at first you don't succeed, imitate.


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