Hi, I am creating my own language with racket, it's the same as racket except that I can embed metadata anywhere in the code. I have implemented a read and read-syntax function which detects the metadata and returns (make-special-comment metadata) this seems to be the only way to remove it from the code. The documentation on special-comments does not give any details on what it's used for but I did see references to it in parser-tools/lex.rkt. My questions are: Whats the difference in using the reader and expander layers in racket from using lex and yacc? How are special-comments used in racket? Is there any way to access the metadata outside of the reader? Thanks