> 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/tokenization-models.md).

# Tokenization Models

Tokenization models are frameworks that define how [Text-Based Tokens](/text-based-tokens-tbts.md) are structured. Xyxyx introduces two foundational tokenization models — 1x1 and A4 —, which adhere to different intended use cases.

<table><thead><tr><th width="208">Model</th><th>Description</th></tr></thead><tbody><tr><td><a href="#id-1x1">1x1</a></td><td>A model for tokenizing short text records</td></tr><tr><td><a href="#a4">A4</a></td><td>A model for tokenizing long text records</td></tr></tbody></table>