We added an advanced search to the directory. You can now also search by waypoint type, height, activity type, tour date, and geo-tags. A similar search, except for the geo-tags, exists in the map.
PS: I'm not sure of all translations, so please if you notice something strange, let me know.
BONUS: You can also search for two geo-tags, like VS,TI to find all points on the border of two cantons!