The REGIS Reader first scans the folder it is given for the requested REGIS files. For each feature file found , the Reader checks to see if the corresponding topology file exists. If it does not exist, a warning message is given. If it does exist, all the features in the file are processed. The Reader extracts features from the file one at a time, and passes them on to the rest of the FME for further processing. When the file is exhausted, the REGIS Reader moves on to the next file in the folder. Optionally a single REGIS file can be specified. If this is the case, only that REGIS file is read.