The editor contains a content assist feature, allowing you to select CTRL + Space to open a list of XQuery constructs, system expressions, and your own functions that exist in modules imported into the open file.

Syntax highlighting shows various elements of XQuery expressions

Validation occurs automatically and errors are reported

Run As features are available for executing local scripts to test your expressions. Refer to Testing XQuery Functions in the XQuery Editor.

You can set preferences for syntax highlighting and other features in the XQuery section of Preferences.