In XPath 2.0 you could get an error for relying on this,
however, since in 2.0 a sequence of more than one node
can't be converted into a string.
It's not what I understand from §5.7.2 (in XSLT 2.0, indeed, not
XPath).
5.7.2 is about constructing nodes (e.g. text nodes or attribute nodes): it's
not about conversion of values to a string. In this situation, multiple
strings are implicitly concatenated, sometimes with a separator.
In 2.0, if you try to pass a sequence of nodes to a function that expects a
single string (for example, the substring() function), or if you try to
convert such a sequence to a string directly by using string() or
xs:string(), you get a type error.
Michael Kay
http://www.saxonica.com/
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