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
Example 24.625.
Extract year ("1999" substring) from ISO date string
substring-before('1999-12-31','-')