Re: [xsl] () eq () vs () = ()

[Michael Kay <mike@xxxxxxxxxxxx>]

On 30/09/2011 10:43, Andrew Welch wrote:
> I've recently found out (over on the saxon list) that:
>
> () eq ()
>
> returns the empty sequence, but
>
> () = ()
>
> returns false.

To add a little footnote, a couple of weeks ago I had a user who had written

test="contains(a,b) = false"

and in 1.0 this produced the same result as if he had written

test="contains(a,b) = false()"

because in 1.0, when you compare a node-set to a boolean you convert the 
node-set to a boolean and compare the two booleans, and the node-set 
false will usually convert to the boolean false(). But in 2.0 his code 
stopped working because the rules for comparing a node-set to a boolean 
changed, the WG imagining very few users would do this intentionally...

Michael Kay
Saxonica