variants 

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

Attribute Information

Used By

Attribute Group attlist.ModifiedBy

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 ModifiedBy element is valid. When the attribute is absent this ModifiedBy element is valid in all variants.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample