key.accid 

Contains an accidental for the tonic key, if one is required, e.g., if
key.pname equals 'c' and key.accid equals 's', then a tonic of C# is
indicated.

Attribute Information

Used By

Attribute Group mei:mei_att.keySigDefault.log.attribute.key.accid

Source 

<xs:attribute name="key.accid" type="mei:mei_data.ACCIDENTAL.IMPLICIT">
  <xs:annotation>
    <xs:documentation>Contains an accidental for the tonic key, if one is required, e.g., if key.pname equals 'c' and key.accid equals 's', then a tonic of C# is indicated.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample