A simple binary file format for storing arbitrary meta and user data. A meta archive uses a simple binary file format to store both meta and user data together in a single file. A mar file may be suitable in situations where a full-scale database is not. Both the mar library and the accompanying utility are written in C with the intention of porting to many platforms. WWW: http://www.emantic.co.uk/mark/ - ehaupt ehaupt@critical.ch