> For the complete documentation index, see [llms.txt](https://docs.claret.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.claret.app/api-reference/reference-and-master-data.md).

# Reference & Master Data

Read-only master data: items, units of measure, calendars, locations, customer groups, and other configuration.