> For the complete documentation index, see [llms.txt](https://sixnetwork.gitbook.io/nft-gen-2-tech-doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sixnetwork.gitbook.io/nft-gen-2-tech-doc/overview.md).

# Overview

- [NFT Data Chain](https://sixnetwork.gitbook.io/nft-gen-2-tech-doc/overview/nft-data-chain.md)
- [Cosmos SDK](https://sixnetwork.gitbook.io/nft-gen-2-tech-doc/overview/cosmos-sdk.md)
- [Modules](https://sixnetwork.gitbook.io/nft-gen-2-tech-doc/overview/modules.md): Modules are parts of the chain that collaborate with each other to deliver the chain's functions.
- [Core Module](https://sixnetwork.gitbook.io/nft-gen-2-tech-doc/overview/modules/core-module.md): This module has main functions, which are used to manage NFT schema, NFT Data, and Actions. We can use these 3 data models to provide mutable metadata on the NFT Chain.
- [Oracle](https://sixnetwork.gitbook.io/nft-gen-2-tech-doc/overview/modules/oracle.md)