> For the complete documentation index, see [llms.txt](https://docs.rumbledb.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rumbledb.org/rumbledb-reference/xquery-coverage.md).

# XQuery coverage

RumbleDB 3.0 now officially supports XQuery with 95% of passing tests from the QT3 test suite. We are continuing to work on fixing the remaining 5%.

RumbleDB supports in particular:

* XML Schema validation and annotation
* Modules
* Static typing
* Typed data
* Regular expressions
* Serialization to XML, CSV, HTML, XHTML, JSON, Text
* Higher-order functions (they are even integrated with ML models for training and predicting)

To use XQuery, you can:

* Create and execute files with the extension .xq or .xquery, which RumbleDB will assume is XQuery;
* Or add

`xquery version "3.1";`

at the beginning of your query;

* Or specify the default language as a CLI parameter;
* Or, in a Jupyter notebook, you can use rumble.xquery() or the %%xquery magic.

The doc() function opens individual XML files as expected. We did not yet connect collection() to any layers, but you can use xml-files() instead to open many files e.g. in S3 or HDFS with Amazon EMR.