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RE: syntax, model

• To: "Tyler Close" <tyler@w...>,"Rich Salz" <rsalz@d...>
• Subject: RE: syntax, model
• From: "Dare Obasanjo" <dareo@m...>
• Date: Fri, 24 Oct 2003 11:12:59 -0700
• Cc: <xml-dev@l...>
• Thread-index: AcOaU5mMKVTTiiyZSwKTEPShWJmvIAABkiKw
• Thread-topic: syntax, model

> -----Original Message-----
> From: Tyler Close [mailto:tyler@w...] 
> Sent: Friday, October 24, 2003 9:57 AM
> To: Rich Salz
> Cc: xml-dev@l...
> Subject: Re:  syntax, model
> 
> 
> What's the difference between saying: "the data will fit this 
> form" versus "the possible values are of this form"?

Not much. However in the XML world people have come to make the
distinction between describing the structure of a document (location of
elements and attributes) and specifying the actual values in the
document (textual content of elements and attributes). 
 
> > When you see "xs:any" at the end of an "xs:complexType" 
> declaration, 
> > do you think "base class" or do you think ".*" (the regexp 
> pattern).  
> > It took me some time to get away from the first notion, and 
> it's still 
> > hard to come up with good words to explain it.
> >
> > What is the data model of this?
> >
> >     <xs:element name="Address">
> >        <xs:complexType>
> >            <xs:element name="Street"/>
> >            <xs:element name="Country"/>
> >            <xs:element name="PostalCode"/>
> >        </xs:complexType>
> >     </xs:element>
> 
> We're not connecting on something here, because for me, that 
> XML snippet does describe a data model. It says an Address is 
> composed of a Street, Country and Postal Code. What else is 
> there for a data model to say about an Address?

Since the types of the Street, Country and PostalCode elements is
xs:anyType meaning they can have any content I'm assuming Rich means
that 
there isn't enough information there to do much processing with.  

-- 
PITHY WORDS OF WISDOM 
To err is human, to forgive is against department policy.


This posting is provided "AS IS" with no warranties, and confers no
rights. 

 

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