[//]: # (title: Documentation)

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To provide different kinds of documentation support, the plugin needs to provide an implementation of the [`DocumentationProvider`](upsource:///platform/analysis-api/src/com/intellij/lang/documentation/DocumentationProvider.java) interface and register it in the `com.intellij.lang.documentationProvider` extension point.
A standard base class for such implementations is available in [`AbstractDocumentationProvider`](upsource:///platform/analysis-api/src/com/intellij/lang/documentation/AbstractDocumentationProvider.java).

The `getQuickNavigateInfo()` method returns the text to be displayed when the user holds the mouse over an element with <kbd>Ctrl</kbd> pressed.

When generating complete documentation via `generateDoc()`, use [`DocumentationMarkup`](upsource:///platform/analysis-api/src/com/intellij/lang/documentation/DocumentationMarkup.java) to layout contents (see JavaDoc for details).

Additional custom actions can be added to documentation inlays and documentation popup via `com.intellij.codeInsight.documentation.DocumentationActionProvider` registered in `com.intellij.documentationActionProvider` extension point. (2020.3)

**Example**:
[`DocumentationProvider`](upsource:///plugins/properties/src/com/intellij/lang/properties/PropertiesDocumentationProvider.java) for [Properties language plugin](upsource:///plugins/properties/)