Mechanism for webpage composition

A system, comprising:

• a processor;
• a memory coupled to the processor, the memory storing computer readable program code comprising instructions for:
• during development of a web application, receiving a first 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 first expression specifying a first data source and an activity fragment;
• 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 a sequence of actions, the sequence of actions including the activity fragment, on data from the first data source to generate a result identifying the instance of the first business object type to use to prepopulate the first UI widget.

A computer program product comprising a non-transitory computer readable medium storing computer readable program code, the computer readable program code comprising instructions for:

• during development of a web application, receiving a first 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 first expression specifying a first data source and an activity fragment;
• 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 a sequence of actions, the sequence of actions including the activity fragment, on data from the first data source to generate a result identifying the instance of the first business object type to use to prepopulate the first UI widget.