variants 

The attribute variants defines the list of variants in which this SuperClass is valid. When the attribute is absent the SuperClass is valid in all variants.

Attribute Information

Used By

Attribute Group attlist.SuperClass

Source 

<xs:attribute name="variants" type="xs:IDREFS">
  <xs:annotation>
    <xs:documentation xml:lang="en-US">The attribute variants defines the list of variants in which this SuperClass is valid. When the attribute is absent the SuperClass is valid in all variants.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample