

The LEF file actually stores this swimming-related information in an XML form. These LXF files are essentially ZIP files that store a compressed LEF file. It stores swimming event data which aids in organizing competitions and record-keeping by facilitating the exchange of data between race organizers, swimming clubs, and associations.

BricksViewer can be used to open LXF files on Windows, macOS as well as Linux computers. LEGO Digital Designer and BrickLink Studio can be used to access LXF files on Windows and macOS systems. An older version of the LXF LEGO data file format also contains a third file MODEL100.MODEL within its ZIP container. This ZIP file consists of two files, namely IMAGE100.PNG (a PNG file containing the design preview data) and IMAGE100.LXFML file ( LXFML file contains the design data in an XML format). The data in the LXF files contains three-dimensional model information saved in a ZIP format.
