* filter `osmDateParse`: returns an array with the lower and upper boundary of the year of a `start_date` tag. See [https://github.com/plepe/openstreetmap-date-parser](openstreetmap-date-parser) for details.
* filter `natsort`: Sort an array naturally, see [https://www.npmjs.com/package/natsort](natsort) for details.
* filter `unique`: Remove duplicate elements from an array.
* filter `md5`: calculate md5 hash of a string.
Notes:
* Variables will automatically be HTML escaped, if not the filter raw is used, e.g.: {{ tags.name|raw }}