fn:for-each
Applies the function item $f to every item from the sequence
            $seq in turn, returning the concatenation of the resulting sequences in
          order.
for-each($seq as item()*, $f as function(item()) as item()*) ➔ item()*
| Arguments | |||
| 
 | $seq | item()* | The input sequence: the supplied function will be applied to each item in this sequence | 
| 
 | $f | function(item()) as item()* | The function item to be invoked on each member of the supplied sequence | 
| Result | item()* | ||
Namespace
http://www.w3.org/2005/xpath-functions
Links to W3C specifications
XPath 3.0 Functions and Operators
XPath 3.1 Functions and Operators
Notes on the Saxon implementation
Available in Saxon 9.3 - 9.5 as fn:map() with altered argument order
            ($f,$seq), and provided XPath 3.0 is enabled.