opt 

(optional) indicates whether the element is optional or
not

Attribute Information

Used By

Attribute Group tei:att.lexicographic.attribute.opt

Source 

<xs:attribute name="opt" default="false" type="xs:boolean">
  <xs:annotation>
    <xs:documentation>(optional) indicates whether the element is optional or not</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample