The LSD (Locsmith Seismic Data) File module is a small module to handle files in .lsd format. These files are ASCII files that store station and event data in a human readable format as data intervals, i.e. in the form of a lower and upper boundary of the (not really known) true value of e.g. a seismic arrival time.
The LSD file format allows to store both station and phase arrival data in a single file or files with only station or only phase data. This allows to create self-contained data sets for data exchange, but also the use of station libraries for easy maintenance.