> ## Documentation Index
> Fetch the complete documentation index at: https://launchdarkly-preview.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# SDK concepts

> This category contains documentation topics explaining high-level concepts relevant to LaunchDarkly SDKs.

> For the complete documentation index, see [llms.txt](/llms.txt). For the full documentation snapshot, see [llms-full.txt](/llms-full.txt).

This category contains documentation topics explaining high-level concepts relevant to LaunchDarkly SDKs.

These topics include:

* [Getting started with SDKs](/sdk/concepts/getting-started)
* [Analytics events](/sdk/concepts/events)
* [Apple App Store data collection policy](/sdk/concepts/apple-app-store)
* [Choosing an SDK type](/sdk/concepts/client-side-server-side)
* [Contributor's guide](/sdk/concepts/contributors-guide)
* [Domain list](/sdk/concepts/domain-list)
* [Evaluation reasons](/sdk/concepts/evaluation-reasons)
* [Flag evaluation rules in server-side SDKs](/sdk/concepts/flag-evaluation-rules)
* [Persistent data stores](/sdk/concepts/data-stores)
* [Sample applications](/sdk/concepts/sample-applications)
* [Server-side SDK bandwidth usage](/sdk/concepts/server-side-bandwidth)
* [Using flag types](/sdk/concepts/flag-types)
* [Version notifications](/sdk/concepts/version-notifications)
* [Versioning policy](/sdk/concepts/versioning)