Patent attributes
During web application development, receiving a request for a webpage for a first business object type, the first request comprising a first business object type identifier of the first business object type, receiving a first expression for selecting an instance of the first business object type from a plurality of instances of the first business object type from an object data source, the expression specifying a first data source and an operation and generating the webpage, the webpage comprising a first user interface (UI) widget for the first business object type and a first instruction for prepopulating the first UI widget with first data from the instance of the first business object type, the first instruction including the first expression, the first expression executable to perform the operation on data from the first data source to generate a result identifying the instance of the first business object type.