Translation of "albero logico" into English

In Windows Presentation Foundation, the tree containing all the elements and content that are directly created by an application and used for a user interface element. For the specified element, the logical tree is not a strict subset of its visual tree, because elements derived from the Visual base class might contain elements that are not derived from the Visual class. For example, the elements might contain a String, a TextElement, or any other common language runtime object.