- From: Ramkumar Menon <ramkumar.menon@gmail.com>
- Date: Thu, 23 Feb 2006 11:53:01 +0530
- To: xmlschema-dev@w3.org
- Message-ID: <22bb8a4e0602222223m59a3edcehefff664d9b3eac82@mail.gmail.com>
HI Noah,
Thanks for the response. I completely agree with you.
But is there a possiblity of revisiting the "xsd:all" semantics in the near
future.
i.e. either nuking it, and thus enforcing order always.
OR
removing just the restriction on the member cardinalities in the "all"
compositor.
rgds,
Menon
On 2/23/06, noah_mendelsohn@us.ibm.com <noah_mendelsohn@us.ibm.com > wrote:
>
> Ramakumar Menon asks:
>
> > Apart from being a best practice, cd somebody tell me atleast five
> advantages of enforcing order of elements within an XSD.
>
> Sure. XML is intended for document scenarios as well as data. Consider:
>
> <element name="chapter">
> <sequence>
> <element ref="chapterHeading"/>
> <element ref="paragraph" maxOccurs="unbounded"/>
> <element ref="chapterFootnotes"/>
> </sequence>
> </element>
>
> It may be very important, or at least semantically significant, that the
> chapterHeading comes ahead of the paragraphs, and that the
> chapterFootnotes follow. Furthermore, it's clearly important that the XML
> Infoset guarantees that the order of the paragraphs is preserved, if there
> is more than one paragraph.
>
> Keep in mind that XML Schema is made for documents and data together, and
> that is part of its power. That may seem like excess complexity if you're
> just defining lists of part numbers, but then you may one day find that
> you want to include XHTML descriptions for those parts, and suddenly the
> fact that order is significant starts to make sense.
>
> --------------------------------------
> Noah Mendelsohn
> IBM Corporation
> One Rogers Street
> Cambridge, MA 02142
> 1-617-693-4036
> --------------------------------------
>
>
>
>
>
--
Shift to the left, shift to the right!
Pop up, push down, byte, byte, byte!
-Ramkumar Menon
A typical Macroprocessor
--
Shift to the left, shift to the right!
Pop up, push down, byte, byte, byte!
-Ramkumar Menon
A typical Macroprocessor
Received on Thursday, 23 February 2006 06:23:09 UTC