<rss>
   <row>
      <family>Иванов</family>
      <name>Пётр</name>
      <documents>
         <type>pdf</type>
         <name>Паспорт</name>
      </documents>
   </row>
</rss>

ItemsSource="{Binding Mode=Default, Path=>>>./documents<<<}"

    public class ParticipantRow
    {
        public string Surname { get; set; }
        public string Name { get; set; }
        public string Age { get; set; }
        //и так далее
    }

        <ListView
            ItemsSource="{Binding Source={StaticResource MDSource}}" 
            IsSynchronizedWithCurrentItem="True">
            <ListView.View>
                <GridView
                    ColumnHeaderContainerStyle="{StaticResource StretchHeaderStyle}">
                    <GridViewColumn 
                        Header="Фамилия"
                        DisplayMemberBinding="{Binding Mode=TwoWay, Path=Surname}"
                        CellTemplate="{StaticResource TextColumnTemplate}" />
                    <GridViewColumn 
                        Header="Имя"
                        DisplayMemberBinding="{Binding Mode=TwoWay, Path=Name}"
                        CellTemplate="{StaticResource TextColumnTemplate}" />