variants 

The attribute variants defines the variants in which this Meta element is valid. When the attribute is absent the Meta element is valid in all variants.

Attribute Information

Used By

Attribute Group attlist.Meta

Source 

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

Sample