# Notes into Oblivion > Knowledge externalization and critical reflections. Zettelkasten-driven insights alongside book reviews and explorations in information architecture. ## Core Concepts - [What Zettelkasten Intentionally Leaves Out: work-hub as a Work State Layer](https://azw-notes.net/zk/work-hub/): Zettelkasten manages permanent knowledge, not in-progress tasks. work-hub handles the fluid work states that sit between permanent notes and time-based reminders. - [Preventing Knowledge Growth Disconnection](https://azw-notes.net/zk/zk-output/): Preventing the disconnection between growing Zettelkasten and static outputs. A metadata-based linking strategy that preserves the immutability principle while maintaining bidirectional access and knowledge evolution. - [Zettelkasten Workflow: Preserving Context in PKM](https://azw-notes.net/zk/zk-workflow/): Practical Zettelkasten workflow addressing context loss in PKM tools. Covers folder structure, naming conventions, and link-based context preservation using Obsidian. ## Optional - [Complete Sitemap](https://azw-notes.net/sitemap.xml): Comprehensive index of all articles