Outliners
Outliners are a class of PKM tools where information is organized into hierarchical, nested lists. Unlike long-form note-takers, the atomic unit of an outliner is the Block (usually a bullet point) rather than the page.
Core Concepts
- Hoisting (Zooming): The ability to focus on a single bullet point and its children, treating it as the "root" of a new document. This helps manage cognitive load by hiding irrelevant information.
- Infinite Nesting: Ideas can be broken down into increasingly granular sub-points, encouraging deep structural thinking.
- Block References: Because every bullet is a unique block, it can be linked to or mirrored (transcluded) in other parts of the system.
Significant Tools
- Workflowy: A minimalist "infinite document" that popularized the modern zooming outliner.
- Dynalist: A more structured outliner with folders and markdown support.
- Logseq / Roam: Modern "networked outliners" that add bi-directional linking to the block structure.
- org-mode: The venerable power-user outliner based on plain text.
Outliner vs. Long-Form
While tools like Obsidian are "Page-First," outliners are "Block-First." Outliners are often preferred for the thinking/brainstorming phase of a project, while long-form tools are preferred for storage/publishing.