Method and system for data binding in a block structured user interface scripting language

A method and system is generally directed to retrieving data from an external source and binding the data to a structure used in executing a UI script. The external source may be on a local machine located across a network. The UI script is transformed to a tree structure. The relevant portions of the tree structure are cloned and manipulated to insert the data from the external source. The cloned portions of the tree structure are then grafted back into the tree. The tree structure is then used to display the UI corresponding to the UI script that includes the data from the external source.