> 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.
StandardDescription
ERC-721FThe 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 (svgString) at the time of minting.
ERC-404The 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).
ERC-721The ERC-721 is a non-fungible token standard.
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