code: func RegisterStringConversion(dataType IRI, fnc StringConversion) {
  	if fnc == nil {
  		delete(knownConversions, dataType)
  	} else {
  		knownConversions[dataType] = fnc
  		if short := dataType.Short(); short != dataType {
  			knownConversions[short] = fnc
  		}
  		if full := dataType.Full(); full != dataType {
  			knownConversions[full] = fnc
  		}
  	}
  }
docs: // RegisterStringConversion will register an automatic conversion of
  // TypedString values with provided type to a native equivalent such as Int, Time, etc.
  //
  // If fnc is nil, automatic conversion from selected type will be removed.