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+# MDN data
+
+> **Note:** We are in the process of deprecating the `mdn/data` package in favor of [`w3c/webref`](https://github.com/w3c/webref). If this could present a problem to your project, please contact us via our [GitHub discussions](https://github.com/mdn/mdn-community/discussions/categories/platform). Thank you.
+
+[https://github.com/mdn/data](https://github.com/mdn/data)
+
+Maintained by the [MDN team at Mozilla](https://wiki.mozilla.org/MDN).
+
+This repository contains general data for Web technologies.
+
+This data is used in MDN documentation, to build
+[information boxes](https://developer.mozilla.org/en-US/docs/Web/CSS/background)
+or [sidebar navigation](https://developer.mozilla.org/en-US/docs/Web/API/Window).
+External tools have started to make use of this data as well.
+For example, the [CSSTree](https://github.com/csstree/csstree/) CSS parser.
+
+[![NPM version](https://img.shields.io/npm/v/mdn-data.svg)](https://www.npmjs.com/package/mdn-data)
+[![lint](https://github.com/mdn/data/actions/workflows/lint.yml/badge.svg)](https://github.com/mdn/data/actions/workflows/lint.yml)
+
+## Repository contents
+
+There's a top-level directory for each broad area covered: for example, `api`
+and `css`. Inside each of these directories is one or more
+JSON files containing the data.
+
+### api
+
+Contains data about Web APIs:
+
+- API inheritance (interface inheritance and mixin implementations)
+
+### css
+
+Contains data about:
+
+- CSS at-rules
+- CSS properties
+- CSS selectors
+- CSS syntaxes
+- CSS types
+- CSS units
+
+Read more about [CSS data](https://github.com/mdn/data/blob/master/css/readme.md) and the format of the files.
+
+### l10n
+
+The l10n folder contains localization strings that are used in the various
+json files throughout this repository.
+
+## Problems?
+
+If you find a problem, please [file an issue](https://github.com/mdn/data/issues/new).
+
+## Contributing
+
+We're very happy to accept contributions to this data. Please familiarize yourself
+with the schema for the data you're editing, and send us a pull request. See also the [Contributing file](https://github.com/mdn/data/blob/master/CONTRIBUTING.md) for more information.
+
+## See also
+
+- [https://github.com/mdn/browser-compat-data](https://github.com/mdn/browser-compat-data)
+  for compatibility data for Web technologies