> For the complete documentation index, see [llms.txt](https://t2-world.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://t2-world.gitbook.io/docs/intro/what-is-t2/the-t2-fundamentals.md).
# The t2 Fundamentals
## The t2 Space Odyssey
t2 is a world of narratives curated by time. Here, people can freely travel to read, write, and curate content as a collaboration and social engagement.
From the biggest to the smallest scales of the network, the hierarchy helps us explore with our intuition as a traveling guideļ¼
**XL: t2 World (Platform & Protocol Level)**
The sum of all content, people, items, and actions on t2. \
The ultimate public goods and source code.\
\
**L: Territories (Community Level)**
Territories are the permissionless article clubs on t2. \
Territories bring their shared passion and unique points of view to the world.\
\
**M: Spaces (Topic Level)**
A niche topic within a territory.\
When a space becomes big enough, it might branch out to become an independent territory.\
\
**S: Content**
Articles. The medium of attention, the catalyst of engagements.
#### **XS: Actions (Engagements)**
A piece of attention history, a comment, a note, a highlight, or a reaction.
## **Attention links them all**
Attention is the ultimate scarcity that links/curates all items in the world.
### **Items on t2 include:**
* An Article
* A User
* A Space
* A Territory
**In the future, items will also include:**
* A Note
* A Highlight
* A Comment
* A Proposal
* A piece of Attention History
---
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