wp = null; // We leave this null so we can tell if it's been created
pc = null; // We leave this null so we can tell if it's been created
sc = new ScannerCapture (); // Add this to icm if needed
scanm = new ScannerModel (); // Add this to sc if needed
sss = new ScanningSystemSoftware (); // add this to sc if needed
id = new ImageData (); // Add this to ccs if needed
gps = new GPSData (); // Add this to ccs if needed
sd = new SubjectDistance (); // Add this to id if needed
// Build DigitalCameraCapture with subelements, but don't hook it to icm
// until it's needed.