Re: Does the count() function require access to the wh

On 14 Jan 2014, at 10:11, Costello, Roger L. <costello@xxxxxxxxx> wrote:

> Yesterday Michael Kay wrote:
>
> 	//x is a "crawling" expression - one that selects
> 	nodes which may overlap each other.
>
> Michael, I do not understand what you mean by "overlap". It seems like an
important concept, since you have used that word repeatedly.
>

I mean that within the set of nodes selected by //x, there may be two nodes A
and B such that A is an ancestor of B.

(I'm not using the term overlap in the sense of non-hierarchic markup: perhaps
that's the cause of any confusion).

Michael Kay
Saxonica