'Parse the <measure> element.'

def _parse(self):

    for child in self.xml_measure:
        if (child.tag == 'attributes'):
            self._parse_attributes(child)
        elif (child.tag == 'backup'):
            self._parse_backup(child)
        elif (child.tag == 'direction'):
            self._parse_direction(child)
        elif (child.tag == 'forward'):
            self._parse_forward(child)
        elif (child.tag == 'note'):
            note = Note(child, self.state)
            self.notes.append(note)
            self.state.previous_note = note
            if ((note.voice == 1) and (not note.is_in_chord)):
                self.duration += note.note_duration.duration
        elif (child.tag == 'harmony'):
            chord_symbol = ChordSymbol(child, self.state)
            self.chord_symbols.append(chord_symbol)
        else:
            pass
