Runway has a number of built in routing tokens, ready to use. They cover many common patterns. If your needs go beyond those, you can define custom tokens with no performance overhead.

The default tokens have a bias towards a latin character set.

Token Matches Example
* Anything
i Integers 1000
a Letters a-z m
slug Letters a-z, numbers 0-9 and dashes olympic-games-2016
year Four-digit year from 1000 to 2999 2015
isodate ISO date format 2015-12-25