> For the complete documentation index, see [llms.txt](https://base-tech.gitbook.io/base/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://base-tech.gitbook.io/base/base-bigbang-language/4.-storing-data/4.3-maps.md).

# 4.3 Maps

Data maps are a type of data structure known as hash tables. They allow you to map keys to specific values. Unlike tuple keys, data map keys are not hard-coded names; they are represented as specific concrete values. Maps should be used when relating data to other data.