Module Fn_error

module Fn_error: sig .. end

type xquery_error_msg = Physical_value.item * Physical_value.item option * Physical_value.item list 

exception Xquery_error of xquery_error_msg

val raise_error : Processing_context.processing_context -> Physical_value.item list -> 'a

val downgrade_error : Processing_context.processing_context -> xquery_error_msg -> 'a