Godley/MuseParse

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE score-partwise PUBLIC "-//Recordare//DTD MusicXML 1.0 Partwise//EN"
                                "http://www.musicxml.org/dtds/partwise.dtd">
<score-partwise>
  <identification>
    <miscellaneous>
      <miscellaneous-field name="description">Non-traditional key signatures,
          where each alteration is separately given. Here we have (f sharp, 
          a flat, b flat) and (c flatflat, g sharp sharp, d flat, b sharp, f 
          natural), where in the second case an explicit octave is given for 
          each alteration.</miscellaneous-field>
    </miscellaneous>
  </identification>
  <part-list>
    <score-part id="P1">
      <part-name>MusicXML Part</part-name>
    </score-part>
  </part-list>
  <!--=========================================================-->
  <part id="P1">
    <measure number="1">
      <attributes>
        <divisions>1</divisions>
        <key>
          <key-step>F</key-step>
          <key-alter>1</key-alter>
          <key-step>A</key-step>
          <key-alter>-1</key-alter>
          <key-step>B</key-step>
          <key-alter>-1</key-alter>
        </key>
        <time>
          <beats>2</beats>
          <beat-type>4</beat-type>
        </time>
        <clef>
          <sign>G</sign>
          <line>2</line>
        </clef>
      </attributes>
      <note>
        <pitch>
          <step>C</step>
          <octave>4</octave>
        </pitch>
        <duration>2</duration>
        <voice>1</voice>
        <type>half</type>
      </note>
    </measure>
    <measure number="2">
      <attributes>
        <key>
          <key-step>C</key-step>
          <key-alter>-2</key-alter>
          <key-step>G</key-step>
          <key-alter>2</key-alter>
          <key-step>D</key-step>
          <key-alter>-1</key-alter>
          <key-step>B</key-step>
          <key-alter>1</key-alter>
          <key-step>F</key-step>
          <key-alter>0</key-alter>
          <key-octave number="1">2</key-octave>
          <key-octave number="2">3</key-octave>
          <key-octave number="3">4</key-octave>
          <key-octave number="4">5</key-octave>
          <key-octave number="5">6</key-octave>
        </key>
      </attributes>
      <note>
        <pitch>
          <step>C</step>
          <octave>4</octave>
        </pitch>
        <duration>2</duration>
        <voice>1</voice>
        <type>half</type>
      </note>
      <barline location="right">
        <bar-style>light-heavy</bar-style>
      </barline>
    </measure>
  </part>
</score-partwise>