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

Re: XPath expression for checking that an xs:duration

Subject: Re: XPath expression for checking that an xs:duration value is not negative?
From: Brandon Ibach <brandon.ibach@xxxxxxxxxxxxxxxxxxx>
Date: Sat, 23 Apr 2011 10:49:25 -0400
Re:  XPath expression for checking that an xs:duration
On Sat, Apr 23, 2011 at 10:39 AM, David Carlisle <davidc@xxxxxxxxx> wrote:
> On 23/04/2011 14:22, Costello, Roger L. wrote:
>> What XPath expression will tell me if the xs:duration value in this
>> element is not negative:
>>
>>     <duration>_______</duration>
>
> XSL F&O says:
> ..... Note that no ordering relation is defined on xs:duration values...
>
> so you'll need to cast to a type that does have an ordering relation
> either xs:yearMonthDuration or xs:dayTimeDuration so something like
>
> xs:yearMonthDuration(duration) ge xs:yearMonthDuration(P0Y)

Given that section 3.2.6.1 (Lexical representation - xs:duration) of
XML Schema Part 2 says "An optional preceding minus sign ('-') is
allowed, to indicate a negative duration. If the sign is omitted a
positive duration is indicated.", wouldn't it be sufficient to just
check for the leading minus sign?

duration[substring(., 1, 1) != '-']

-Brandon :)

Current Thread

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
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.