The wiki is very, very out of date and it's something that's undergoing an overhaul (when Dan can get time to do so).
Player-owned places are fairly straightforward to learn once you're in there, but the drag-and-drop is a reference to the programming aspects of a place. They're mostly conditional things, like being able to display different descriptions for different times of day... but they go all the way up to being able to set up logic chains sufficient to set variables based on past events, displaying different things depending on what room a player came into a given room from... there's a lot of depth to it that I've never mucked with.
Player-owned places are fairly straightforward to learn once you're in there, but the drag-and-drop is a reference to the programming aspects of a place. They're mostly conditional things, like being able to display different descriptions for different times of day... but they go all the way up to being able to set up logic chains sufficient to set variables based on past events, displaying different things depending on what room a player came into a given room from... there's a lot of depth to it that I've never mucked with.