> For the complete documentation index, see [llms.txt](https://v5docs.keyfax.biz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://v5docs.keyfax.biz/script-data.md).

# Script data

Databoxes are how a script reads and writes information: values from your housing system, values the caller gives, and values the script works out for itself. Expressions are how those values are combined.

**In this section**

* Databoxes
* SQL query databoxes
* HTTP request databoxes
* System values and company data
* Databox expressions
* Testing databoxes and expressions