> For the complete documentation index, see [llms.txt](https://docs.tivity.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tivity.one/building-an-application/expressions.md).

# Expressions

- [Expressions in Expressions](https://docs.tivity.one/building-an-application/expressions/expressions-in-expressions.md): Complete reference of built-in expressions in the Expressions of the TIVITY platform.
- [Expressions in Condition Values](https://docs.tivity.one/building-an-application/expressions/expressions-in-condition-values.md): Complete reference of built-in expressions in the Conditions of the TIVITY platform.