Processes the supplied sequence from left to right, applying the supplied function repeatedly to each item in turn, together with an accumulated result value.
fold-left($seq as item()*, $zero as item()*, $f as function(item(), item()*) as item()*) ➔ item()*
The input sequence
The initial value (the value to be returned if the sequence is empty)
function(item(), item()*) as item()*
The function to be applied to each item in the sequence
Links to W3C specifications
Notes on the Saxon implementation
Available in Saxon 9.3 - 9.5 with altered argument order (
and provided XPath 3.0 is enabled.