> For the complete documentation index, see [llms.txt](https://docs.xyxyx.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xyxyx.pro/token-standards.md).

# Token Standards

Xyxyx's tokenization models (1x1 and A4) can be built upon three token standards — ERC-721F, ERC-404, and ERC-721 —, which adhere to different intended use cases.

<table><thead><tr><th width="176.45458984375">Standard</th><th>Description</th></tr></thead><tbody><tr><td><a href="/pages/bozJo3H5ACzdLr6PvVSB">ERC-721F</a></td><td>The ERC-721F is a variant of the ERC-721 standard developed by Xyxyx. ERC-721F is designed to provide highly customizable token issuance by assigning each token an individualized SVG output (<code>svgString</code>) at the time of minting.</td></tr><tr><td><a href="#erc-404">ERC-404</a></td><td>The ERC-404 is a hybrid token standard that combines the functionalities of the ERC-721 standard (non-fungible tokens) and the ERC-20 standard (fungible tokens).</td></tr><tr><td><a href="/pages/bozJo3H5ACzdLr6PvVSB">ERC-721</a></td><td>The ERC-721 is a non-fungible token standard.</td></tr></tbody></table>