[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: What does "optional" mean?

  • From: Alex Muir <alex.g.muir@gmail.com>
  • To: Mukul Gandhi <gandhi.mukul@gmail.com>
  • Date: Sun, 26 Feb 2012 22:45:15 +0000

Re:  What does "optional" mean?
I would disagree that this is an example that makes the notion optional needed.

On Sun, Feb 26, 2012 at 2:51 PM, Mukul Gandhi <gandhi.mukul@gmail.com> wrote:
> Following is an use case, that probably makes the notion of "optional"
> in XML documents *necessary*,
>
> Let's assume, that a book object may be represented in an XML format
> in either of following ways,
>
> <book isbn="123">
>   <name>book1</name>
> </book>
>
> OR
>
> <book>
>   <isbn>123</isbn>
>   <name>book1</name>
> </book>
>
> i.e, an ISBN number of book may be represented either as an attribute
> or as a child element of element book, but not at both of these
> places

This I would think is the kind of thing you wouldn't do. It would be
better to stick to one or the other and perhaps better to use an
element for readability as the number of attributes increase. Don't
forget that an optional choice like this means more programming in
that a case now is required to check which one exists and perhaps an
error check to make sure they don't both exist.

I suppose a privacy element should have optional aspects depending on
how information much you want to give or were able to collect from
someone.

<Privacy>
 <Name>jasmine</Name>
<SSN>2334434</SSN>
...
</Privacy>

-- 


Alex Muir
Program Organizer - University Technology Student Work Experience Building
University of the Gambia
http://sites.utg.edu.gm/alex/

Come visit Gambia enjoy the sun and culture and help out! Software
Engineering Lecturers needed!
Join UTSWEB do local contract work or give a student a contract
remotely for slow, cheap and good work http://sites.utg.edu.gm/utsweb/

Some fantastic African/Canadian Fusion  http://bafila.bandcamp.com/


[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]


PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
 

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.


Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.