mode 

specifies the effect of this declaration on its parent
module.

Attribute Information

Source 

<xs:attribute name="mode" default="add">
  <xs:annotation>
    <xs:documentation>specifies the effect of this declaration on its parent module.</xs:documentation>
  </xs:annotation>
  <xs:simpleType>
    <xs:restriction base="xs:token">
      <xs:enumeration value="add">
        <xs:annotation>
          <xs:documentation>this declaration is added to the current definitions</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="delete">
        <xs:annotation>
          <xs:documentation>this declaration and all of its children are removed from the current setup</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
</xs:attribute>

Sample