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References is one of the most important and tricky parts in the implementation of a custom language support. Resolving references means the ability to go from the usage of an element to the declaration of the element, completion, rename refactoring, find usages, etc.

{span:class=id}com.intellij.psi.PsiNamedElement{span}

1. Define a base named element class

...

As you see the IDE now resolves the property and provides completion.

Additionally it supports

{span:class=shortcut}Rename{span}

...

<lang.refactoringSupport language="Simple" implementationClass="com.simpleplugin.SimpleRefactoringSupportProvider"/>

11. Run the project

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