> [!tldr] Notetaking tools oriented around [[Hierarchy]]s "Outliners" are a class of [[Notetaking Apps]] that are oriented around a hierarchical data structure. Notable inclusions are: - [[Notion]] - [[Logseq]] - Roam Research The essence of an outliner is that, like [[YAML]], things that are indented under other things are *contained* by it. **** # More ## Source - self