Checking XML language server feature flags

Check if the features are enabled. The XML plug-in provides multiple settings that can enable and disable features:

To diagnose whether the XML language server is working, create a simple XML element, such as <hello></hello>, and confirm that it appears in the Outline panel on the right.

If the document symbols do not show, ensure that the xml.documentSymbols.enabled attribute is set to true. If it is true, and there are no symbols, the language server may not be hooked to the editor. If there are document symbols, then the language server is connected to the editor.

Ensure that the features that the user needs, are set to true in the settings (they are set to true by default). If any of the features are not working, or not working as expected, file an issue against the Language Server.