A design, such as an Actuate BIRT Design (.rptdesign), is an executable file that, when run, generates a document.The files in /Public/BIRT and BIRT Studio Examples include sample .rptdesign files and sample Actuate BIRT document (.rptdocument) files, as shown in Figure 1‑8. Executing a .rptdesign file generates a .rptdocument file.