The invention provides a method for annotating a computer program. Program
code for the computer program can be displayed in a user interface (100)
having a code display window (105). One or more elements of the displayed
program code can be linked to a data file (120) having one or more
implementation instructions for elements of the computer program. In
response to a query initiated by selecting one of the linked elements
(157), a corresponding implementation instruction for the queried element
can be displayed in an implementation display window (115) of the user
interface.