An object model allows code to be developed using a programming environment to access the functionality of an application, in a word processing application, for example. The object model may be used to manipulate one or more data bindings in an application. Code may also be developed using a programming environment for reacting to changes, in either direction, of a content region or a node in XML data associated with one or more data bindings. Code may be developed to define data bindings between file content and content within data in a data store. Additionally, code may be developed that reacts to changes within a bound region of a file or within a data store, trapping or intercepting events, such as edits, additions, deletions, etc.