Name
substring-before — Returns the substring of the first argument string that precedes the first occurrence of the second argument string in the first argument string.
Synopsis
string substring-before ( |
source_strg string , |
sub_strg string ) ; |
Description
If the source_strg
does
not contain sub_strg
, the
function returns the empty string. Otherwise, it finds the first
occurrence of sub_strg
and
returns the pert of source_strg
that precedes the
occurrence. If any argument is not a string, it is converted to
string using rules for string() XPATH function.
Parameters
source_strg
String where the search is performed
sub_strg
String to search
Return Types
String
Examples
Example24.625.
Extract year ("1999" substring) from ISO date string
substring-before('1999-12-31','-')