# MDN CSS data

This folder contains data about the different features of the [CSS](https://developer.mozilla.org/en-US/docs/Web/CSS) language.

## How to update the CSS JSON DB

A guide to making changes is provided in the [How to update the CSS JSON DB](../docs/updating_css_json.md) document.

## Different types of CSS data

The CSS data is split into these parts:

- **at-rules**:
  [data](https://github.com/mdn/data/blob/main/css/at-rules.json) |
  [schema](https://github.com/mdn/data/blob/main/css/at-rules.schema.json) |
  [docs](https://github.com/mdn/data/blob/main/css/at-rules.md)
- **functions**:
  [data](https://github.com/mdn/data/blob/main/css/functions.json) |
  [schema](https://github.com/mdn/data/blob/main/css/functions.schema.json) |
  [docs](https://github.com/mdn/data/blob/main/css/functions.md)
- **properties**:
  [data](https://github.com/mdn/data/blob/main/css/properties.json) |
  [schema](https://github.com/mdn/data/blob/main/css/properties.schema.json) |
  [docs](https://github.com/mdn/data/blob/main/css/properties.md)
- **selectors**:
  [data](https://github.com/mdn/data/blob/main/css/selectors.json) |
  [schema](https://github.com/mdn/data/blob/main/css/selectors.schema.json) |
  [docs](https://github.com/mdn/data/blob/main/css/selectors.md)
- **syntaxes**:
  [data](https://github.com/mdn/data/blob/main/css/syntaxes.json) |
  [schema](https://github.com/mdn/data/blob/main/css/syntaxes.schema.json) |
  [docs](https://github.com/mdn/data/blob/main/css/syntaxes.md)
- **types**:
  [data](https://github.com/mdn/data/blob/main/css/types.json) |
  [schema](https://github.com/mdn/data/blob/main/css/types.schema.json) |
  [docs](https://github.com/mdn/data/blob/main/css/types.md)
- **units**:
  [data](https://github.com/mdn/data/blob/main/css/units.json) |
  [schema](https://github.com/mdn/data/blob/main/css/units.schema.json) |
  [docs](https://github.com/mdn/data/blob/main/css/units.md)