code: func valueDescriptorByLabelHandler(w http.ResponseWriter, r *http.Request) {
  	defer r.Body.Close()
  
  	vars := mux.Vars(r)
  	label, err := url.QueryUnescape(vars["label"])
  
  	// Problem unescaping
  	if err != nil {
  		http.Error(w, err.Error(), http.StatusBadRequest)
  		LoggingClient.Error("Error unescaping label for the value descriptor: " + err.Error())
  		return
  	}
  
  	switch r.Method {
  	case http.MethodGet:
  		v, err := getValueDescriptorsByLabel(label)
  		if err != nil {
  			switch err.(type) {
  			case *errors.ErrDbNotFound:
  				http.Error(w, err.Error(), http.StatusNotFound)
  				return
  			default:
  				http.Error(w, err.Error(), http.StatusInternalServerError)
  				return
  			}
  		}
  
  		encode(v, w)
  	}
  }
docs: // Get value descriptors who have one of the labels
  // api/v1/valuedescriptor/label/{label}