set:
[FIELD_NAME](/FIELD_NAME): <string format>
[FIELD_NAME](/FIELD_NAME):
{value]: <string format>
[regexp](/regexp): <regexp groups>
[replace](/replace): [<regexp what>, <with text>]
Simple example:
set:
path: /foo/bar/%(series_name)s/
Advanced example:
set:
path:
value: /foo/bar/%(series_name)s/
replace: [' ', '.']