Tana is a tool for thought that helps you organize your ideas, tasks, and knowledge all in one place. Unlike traditional note-taking apps where information gets trapped in separate documents, Tana is built on a simple but powerful idea: everything is connected.

Think of it as a flexible workspace where you can capture thoughts as they come and then structure them later. This approach lets your ideas grow organically without forcing them into rigid folders from the start. Let's look at the core concepts that make this possible.

The most fundamental building block in Tana is the node. A node can be anything you want it to be. It could be a single word, a full paragraph, a to-do item, a person's name, or a project idea.

Imagine you're jotting down notes during a meeting. Each bullet point you write is a node. A task that comes to mind? That's a node. The book someone recommended? Also a node. This makes capturing information incredibly fast and fluid.

Each node can have its own children, creating a natural hierarchy. This is just like outlining, but with more flexibility. You can zoom into any node to focus on it, or zoom out to see the bigger picture.

This is where Tana really shines. A Supertag gives a node superpowers. It turns a plain piece of text into a structured piece of data with its own properties, or fields.

Let's say you have a node for a book you want to read. On its own, it's just text. But if you add the #book Supertag to it, you can define specific fields for all books, such as Author, Genre, and Status.

Every time you tag something with #book, Tana will prompt you to fill in these fields. This creates consistency. Later, you can create a search that automatically pulls together every node tagged #book and displays them in a neat table, sorted by author or status.

Supertags transform your notes from a passive collection of text into an active, organized database that you design yourself.

Because everything is a node, you can link any piece of information to another. This is done using a simple @ mention. If you're writing a meeting note and mention a project, you can @-link directly to the project's node. Now, there's a live connection between the meeting and the project.

These links create a knowledge graph, a web of all your interconnected ideas. When you look at the project node, you can see every meeting, task, and note that links to it. This reveals hidden relationships and keeps all related information just a click away.

This network structure helps you see the context behind your information. You're not just remembering a fact; you're remembering how it connects to everything else you know. It mirrors the way our brains actually work, building associations between concepts.

Now that you understand the basics of nodes, Supertags, and the knowledge graph, you're ready to start building your own personal knowledge system in Tana.