> For the complete documentation index, see [llms.txt](https://tutorials.openactive.io/open-booking-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tutorials.openactive.io/open-booking-sdk/reference/dependencies.md).

# Dependencies

The **Open Opportunity Data Feeds** and **Dataset Site** features within the **Open Booking SDK** are available separately as libraries, useful for advanced or non-bookable implementations.

The table below lists all OpenActive booking/listing system libraries:

| Library                     | [.NET](https://docs.microsoft.com/en-us/dotnet/standard/net-standard)                    | [PHP](https://www.php.net/releases/5_4_0.php)                                     | [Ruby](https://www.ruby-lang.org/en/)                                         |
| --------------------------- | ---------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------- | ----------------------------------------------------------------------------- |
| Open Opportunity Data Feeds | [OpenActive.NET](https://www.nuget.org/packages/OpenActive.NET/)                         | [openactive/models](https://packagist.org/packages/openactive/models)             | [openactive](https://rubygems.org/gems/openactive)                            |
| Dataset Site                | [OpenActive.DatasetSite.NET](https://www.nuget.org/packages/OpenActive.DatasetSite.NET/) | [openactive/dataset-site](https://packagist.org/packages/openactive/dataset-site) | [openactive-dataset\_site](https://rubygems.org/gems/openactive-dataset_site) |
| Open Booking SDK            | [OpenActive.Server.NET](https://www.nuget.org/packages/OpenActive.Server.NET/)           | N/A                                                                               | N/A                                                                           |

##