MarkLogic 10 Product Documentation
fn:substring

fn:substring(
   $sourceString as xs:string?,
   $startingLoc as xs:double,
   [$length as xs:double]
) as xs:string?

Returns a substring starting from the $startingLoc and continuing for $length characters.

Parameters
sourceString	The string from which to create a substring.
startingLoc	The number of characters from the start of the $sourceString.
length	The number of characters beyond the $startingLoc.

fn:substring("123456", 2, 2)

=> "23"

MarkLogic 10 Product Documentationfn:substring