saxon:line-number() ==> xs:integer

saxon:line-number($node as node()) ==> xs:integer

This function returns the line number of a selected node within the XML document (or external entity) that contains it. If the argument is supplied, it must be a node; if the argument is omitted, the context item is used, in which case the context item must be a node. If line numbers are not maintained for the current document, the function returns -1.

To ensure that line numbers are maintained, use the -l (letter ell) option on the command line.