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

Re: limits of the generic


Re:  limits of the generic
I wrote:
> I think that it would be better to have a consistent approach to
> partially ordered data types. One of:
>
>   - creating subtypes that are ordered
>   - using three-valued logic
>   - performing an arbitrary conversion to give total ordering

but thinking about it, three-valued logic would be hard to do in XPath
2.0, given the requirements of:

  - backwards compatibility with XPath 1.0 (which treats an empty node
    set as false)

  - compatibility with W3C XML Schema data types and therefore
    xs:boolean, which only has two values: true and false (I guess
    since I'm arguing against changing the semantics of the W3C XML
    Schema data types I shouldn't suggest introducing a new xf:boolean
    primitive data type)

I wonder whether an approach similar to that used for comparing
strings (i.e. allowing users to specify a particular collation to use)
would be a reasonable course of action.

Cheers,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/


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.