Backreferences
"Backreferences" are references in a search regex to capture groups in the same search regex. The "search regex" is the regex used in the "Find" field of the Find/Replace dialog box. Here is the most common backreference syntax:
Absolute: (group one)...
A regex in Notepad++ may have as many capture groups as desired.
(one)(two)(three)...(nine)(more than nine groups!)...
Anonymous capture groups use the standard syntax:
(group)
Named capture groups may use either of following syntax formats:
(?<name>group)
(?'name'group)
Anonymo...