Scheme Macros for Common Lisp [Download mbe.lsp] Dorai Sitaram mbe.lsp defines for Common Lisp the macro definers define-syntax, let-syntax, and letrec-syntax, as described in the Scheme report R5RS [3]. These macro definers, also called macro by example (MBE), use simple patterns, including ellipsis, to specify how a macro should be expanded. They were propounded by Eugene Kohlbecker [1, 2] in th