string() from XPath 1.0

Hello,

while reading the description of the function string(), I stumbled upon
the following:

``An object of a type other than the four basic types is converted to a
string in a way that is dependent on that type.''

Probably I'm overlooking something obvious, but... what else is possible
except boolean, number, string and nodeset/node?

Thanks in advance for suggestions!


-- 
Oleg Parashchenko  olpa@ http://xmlhack.ru/  XML news in Russian
http://uucode.com/blog/  Generative Programming, XML, TeX, Scheme
http://olpa.livejournal.com/