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> I work on a project in Scheme where I use Guile for development > (interactive debugging) and Bigloo (scheme to C compiler) for > production. > > I would like to use the keyword features, but bigloo says that > according to DSSSL, keywords are <ident>: as for Guile they are > :<ident> Guile now uses #:ident as the normal syntax for keywords, and has a reader option (off by default) to recognize the :ident syntax as well. According to R4RS, both :ident and ident: should be treated as a symbol, There is Scheme code out there that depends on identifiers of both forms being symbols. > What does this DSSSL document specify? (BTW, where can I find it > on-line?) > A lot of info on DSSSL can be found off of http://www.jclark.com/dsssl/ > What's the right syntax for keywords? Is it possible for Guile to > recognize <ident>: keywords as well? It depends on what you mean by "right". Common Lisp and most traditional Lisp systems use :ident for keywords, DSSSL (and apparently some Scheme implementations) use ident:, and R4RS says neither of these may be a non-symbol. Since keywords are a non-standard extension to Scheme, there's no absolute agreement on what the correct syntax is. - Maciej Stachowiak