K is short for "keyword". K defines a symbols starting with ":".
val around : Ecaml.Symbol.tval background : Ecaml.Symbol.tval box : Ecaml.Symbol.tval family : Ecaml.Symbol.tval file : Ecaml.Symbol.tval filter : Ecaml.Symbol.tval font : Ecaml.Symbol.tval foreground : Ecaml.Symbol.tval foundry : Ecaml.Symbol.tval group : Ecaml.Symbol.tval height : Ecaml.Symbol.tval inherit_ : Ecaml.Symbol.tval inverse_video : Ecaml.Symbol.tval key_type : Ecaml.Symbol.tval must_match : Ecaml.Symbol.tval name : Ecaml.Symbol.tval overline : Ecaml.Symbol.tval server : Ecaml.Symbol.tval service : Ecaml.Symbol.tval slant : Ecaml.Symbol.tval stipple : Ecaml.Symbol.tval strike_through : Ecaml.Symbol.tval tag : Ecaml.Symbol.tval type_ : Ecaml.Symbol.tval underline : Ecaml.Symbol.tval value_type : Ecaml.Symbol.tval weight : Ecaml.Symbol.tval width : Ecaml.Symbol.t