docs: function(start, end) {
      var results = [];
      // Return empty set for reverse ranges
      if(end < start) {
        
        for(var r=start; r>=end; r--) results.push(SpahQL.result(null, r));
      }
      else {
        for(var i=start; i<=end; i++) results.push(SpahQL.result(null, i));
      }
      
      return results;
    }