Prism.languages.scheme = {
    'boolean' : /#(t|f){1}/,
    'comment' : /;.*/,
    'keyword' : {
	pattern : /([(])(define(-syntax|-library|-values)?|(case-)?lambda|let(-values|(rec)?(\*)?)?|else|if|cond|begin|delay|delay-force|parameterize|guard|set!|(quasi-)?quote|syntax-rules)/,
	lookbehind : true
    },
    'builtin' : {
	pattern :  /([(])(cons|car|cdr|null\?|pair\?|boolean\?|eof-object\?|char\?|procedure\?|number\?|port\?|string\?|vector\?|symbol\?|bytevector\?|list|call-with-current-continuation|call\/cc|append|abs|apply|eval)\b/,
	lookbehind : true
    },
    'string' :  /(["])(?:(?=(\\?))\2.)*?\1|'[^('|\s)]+/, //thanks http://stackoverflow.com/questions/171480/regex-grabbing-values-between-quotation-marks
    'number' : /(\s|\))[-+]?[0-9]*\.?[0-9]+((\s*)[-+]{1}(\s*)[0-9]*\.?[0-9]+i)?/,
    'operator': /(\*|\+|\-|%|\/|<=|=>|>=|<|=|>)/,
    'function' : {
	pattern : /([(])[^(\s|\))]*\s/,
	lookbehind : true
    },
    'punctuation' : /[()]/
};