The TreeView component is used to display an hierarchical list of nodes - similar to the directory view in Windows Explorer. Each node is an instance of TTreeNode. TTreeView.Items (an instance of TTreeNodes) manages the node collection. In a basic tree list, the nodes are just text. It is also possible to have the nodes associated with objects. XMLBlueprint. XMLBlueprint is a fast and smart XML editor for Windows. It supports Syntax Highlighting, Drop Down XML Tips, XML Validation, Unicode, User Tools, FTP and WebDAV.XMLBlueprint XML Editor uses the Virtual TreeView for many reasons: unicode support, speed, and quality..