Disclosed are examples of systems, apparatus, methods and computer program products for providing a base editor component for editing web application builder components in a web application builder framework. A database system maintains a database associated with a number of web application builder components, each with one or more attributes, for constructing web application components based on user input. Based on a user request to add to or modify one or more attributes of a web application builder component, the system retrieves a metadata model associated with the web application builder component that contains nodes corresponding to the component's attributes. The system modifies the metadata model by adding or editing one or more nodes based on the user request, then stores the modified metadata model in one or more server databases.