altsym 

Provides a way of pointing to a user-defined symbol. It must contain an ID
of a <symbolDef> element elsewhere in the document.

Attribute Information

Used By

Attribute Group mei:mei_att.altsym.attribute.altsym

Source 

<xs:attribute name="altsym" type="mei:mei_data.URI">
  <xs:annotation>
    <xs:documentation>Provides a way of pointing to a user-defined symbol. It must contain an ID of a <symbolDef> element elsewhere in the document.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample