key-step 

Non-traditional key signatures can be represented using the Humdrum/Scot concept of a list of altered tones. The key-step element indicates the pitch step to be altered, represented using the same names as in the step element.

Element Information

Model

Source 

<xs:element name="key-step" type="step">
  <xs:annotation>
    <xs:documentation>Non-traditional key signatures can be represented using the Humdrum/Scot concept of a list of altered tones. The key-step element indicates the pitch step to be altered, represented using the same names as in the step element.</xs:documentation>
  </xs:annotation>
</xs:element>

Sample