Why Nested Tags Are Not That Good

A (new) common habit in note-taking is using nested tags, like linking words together in a chain to create categories and subcategories. In theory, this sounds like a great way to keep things organized. In practice, however, these hierarchies stop making sense over time. A setup that feels logical today will eventually create friction when you try to fit new notes into old boxes, forcing you to guess where a piece of information truly belongs.

The real breakdown happens when you try to search for your data. If you group your notes by setting up tags like #events/work and #events/family, you will quickly run into trouble when you start adding other activities. Soon, you will need tags like #meetings/work and #meetings/family. If you want to find everything related to your family, a nested system pulls you in opposite directions because your data is split across different branches. If you try to fix this by reversing the hierarchy — putting the group first, like #family/events and #family/meetings — you just flip the problem, making it incredibly difficult to see all your meetings at once. You end up having to write complicated search formulas just to look at your information from a different angle.

Using flat tags instead gives your system much more freedom. By treating labels like #work, #family, #events, and #meetings as single, independent building blocks, your digital vault becomes completely flexible. Putting two or more flat tags on a single note gives you all the precision of a deep hierarchy without locking you into a permanent structure. Instead of trapping a thought on one specific branch, flat labels let you instantly intersect and view your information from multiple angles at the same time.

While nested tags might look neat on the surface, they build rigid walls around your notes that do not age well. If you want a workflow that focuses on long-term flexibility and fast, effortless searching, structural hierarchies are a trap. Moving to a flat tagging system keeps your data fluid, allowing your vault to grow naturally with your thoughts instead of locking them in a fragile framework.