> For the complete documentation index, see [llms.txt](https://docs.themelia.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.themelia.co/collection-and-curation/basic-filters.md).

# Basic filters

<table><thead><tr><th width="130">Filter</th><th width="550">Description</th></tr></thead><tbody><tr><td><strong>Name</strong></td><td>The name of a cryptocurrency e.g. Bitcoin.</td></tr><tr><td><strong>Symbol</strong></td><td>The symbol of a cryptocurrency e.g. BTC.</td></tr><tr><td><strong>Base Layer</strong></td><td>The base layer a cryptocurrency is built on i.e. the Uniswap token UNI is built on the Ethereum base layer.</td></tr><tr><td><strong>Exchange</strong></td><td>The exchange(s) the cryptocurrency is available on.</td></tr></tbody></table>