The command olps (one line per star) is designed to reduce the data to one line per star by a selection on the data sources. This command is used for example to keep one position only (datatype pos) or to prepare the file mkk.sel.
> olps mk
The program first presents the detailed content and references and asks for a list of references to consider. They should be entered by order of decreasing importance. It finally asks for the output filename.