- From: Florent Georges <fgeorges@fgeorges.org>
- Date: Fri, 2 Sep 2011 12:28:00 +0200
- To: Andrew Welch <andrew.j.welch@gmail.com>
- Cc: vojtech.toman@emc.com, xproc-dev@w3.org
On 2 September 2011 12:20, Andrew Welch wrote:
> On 2 September 2011 11:10, Florent Georges wrote:
Hi,
>> If we look at the definition of EBV[1], actually any string
>> returns true except the empty string. So even 'false' returns
>> true:
>> (: returns true() :)
>> if ( 'false' ) then true() else false()
>> (: returns false() :)
>> xs:boolean('false')
> Don't forget the gotcha that the only non-empty string to
> return false is '0'... xs:boolean('0') returns false.
No. We talk about two different things here: first the EBV,
defined using boolean() (that is, fn:boolean()), and second the
boolean item constructor, that is xs:boolean() (note fn:* versus
xs:*).
For the EBV and fn:boolean(), only the empty string returns
false, all other strings return true (including 'false' and '0').
For xs:boolean(), 'true' and '1' return true, 'false' and '0'
return false, and any other string is a cast error.
Unless I missed something, of course.
Regards,
--
Florent Georges
http://fgeorges.org/
http://h2oconsulting.be/
Received on Friday, 2 September 2011 10:28:47 UTC