Various embodiments include one or more of systems, methods, and software for document modeling. Some embodiments include defining a document model having further models of document portions. The document portions may include a header model including a set of header methods to provide interaction capabilities to other portions of a system and one or more item models, including a set of item methods to provide interaction capabilities to other portions of the system. The header model and the one or more item models may each include an association with one or more component models. Each component model may include a set of component methods to provide interaction capabilities to other portions of the system and component specific logic accessible through the component methods. Maps may also be provided between the models and wall as a link between the set of component methods and the component specific logic.