library(ABC) {
   date : 04/10/04;
   revision : 1.5;
   conditions () {
      weather : bright ;
      temperature : 55 C;
      visible : heavy \
            fog;
   }
   location(work);
   etc ...
}

##</code><code>##

library(ABC) -> date -> value -> 04/10/04
             -> revision -> value -> 1.5
             -> conditions -> weather -> value -> bright
                           -> temperature -> value -> 55
                           -> visible -> value -> heavy fog
             -> location(work) -> value -> 1