dx:history 

To allow storage of past actions on a given parent

Element Information

Model

Attributes

QName Type Fixed Default Use Inheritable Annotation
dx:what xs:string optional
dx:when xs:date optional
dx:who xs:string optional

Source 

<xs:element name="history">
  <xs:annotation>
    <xs:documentation>To allow storage of past actions on a given parent</xs:documentation>
  </xs:annotation>
  <xs:complexType>
    <xs:attribute ref="dx:who"/>
    <xs:attribute ref="dx:when"/>
    <xs:attribute ref="dx:what"/>
  </xs:complexType>
</xs:element>

Sample