<group name="dynamicProperties"><annotation><documentation>A convenience group. This allows an application schema developer to include dynamic properties in a content model in a standard fashion.</documentation></annotation><sequence><element ref="gml:validTime" minOccurs="0"/><element ref="gml:history" minOccurs="0"/><element ref="gml:dataSource" minOccurs="0"/><element ref="gml:dataSourceReference" minOccurs="0"/></sequence></group>