I wanted to improve the monastery to make linking to nodes easier in "monktainer" (a general container template) and it turned out I needed to patch a printf-like format system in "node_info_string" first. This involved searching for other code/node/templates depending on it to avoid other parts to break.

Turned out this [id://...< FORMATS] things is using it too. But since it's nowhere documented for simple users I'm confident no older write-ups were effected.

TL;DR: Just to show how complicated it is for pmdevs to add little improvements to the monastery.

Update

See also How do I link to a node on this site by number?

Turns out it's also used to format the title bar of each node (not to be confused with the written title) and can be configured.

See How do I link to a node on this site by number?:

> Edit your Display Settings and set the Custom Node Title Definition to include %N (to show the node ID). You'll probably want this to show the node's Title as well, so include %T in the setting too.

FWIW: it's this title which will end in your bookmark list after adding (not what's printed inside the body).

So if you are maintaining large link collections like eyepops or discipulus and want to automatically add infos like date and author, a detour via collecting bookmarks and importing them might be helpful. :)

Cheers Rolf
_{(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery}