MarkLogic 12 EA 2 Product Documentation
fn:substring-before

fn:substring-before(
   $input as xs:string?,
   $before as xs:string?,
   [$collation as xs:string]
) as xs:string?

Returns the substring created by taking all of the input characters that occur before the specified $before characters.

Parameters
input	The string from which to create the substring.
before	The string before which the substring is created.
collation	The optional name of a valid collation URI. For information on the collation URI syntax, see the Search Developer's Guide.

fn:substring-before("abcdef", "def")

=> abc

Stack Overflow: Get the most useful answers to questions from the MarkLogic community, or ask your own question.

MarkLogic 12 EA 2 Product Documentationfn:substring-before