C. M. Sperberg-McQueen wrote:

> > When do I have to write a "=" and when a
":=" ?

> In XML attribute-value specifications, you always
> write = and
never :=.

> You write := when writing assignment statements in
> Algol,
Pascal, and related languages. :)

  Like XQuery ;-)

-- 
Florent Georges
http://www.fgeorges.org/