Trouble finding ViewModel property from ListView - binding

Question

I have a rather complicated data binding template and I'm not able to find away back to my ViewModel to access a property and command.
This is how my xaml is set up from Top to Bottom as its layout:
<HierarchicalDataTemplate x:Key="ChapterReferencesTemplate">
<StackPanel>
<DockPanel>
<TextBlock Text="Chapter Reference "/>
<AccessText Text="{Binding Path=Chapter}" />
</DockPanel>
<DockPanel>
<TextBlock Text="Total Reference Verses "/>
<AccessText Text="{Binding Path=Verses}" />
</DockPanel>
<ListView Name="VerseReferencesListView" Height="200"
ItemsSource="{Binding Path=VerseReferences}"
SelectedItem="{Binding Path=DataContext.CurrentVerseReference, Mode=TwoWay, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type src:CreateWritingsViewModel}}}"
AlternationCount="2"
BorderThickness="0"
IsSynchronizedWithCurrentItem="True">
<ListView.View>
<GridView AllowsColumnReorder="true" ColumnHeaderToolTip="xmlNamespace List" >
<GridViewColumn
Header="Verse"
DisplayMemberBinding="{Binding Path=Verse}" Width="Auto">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Width="Auto" TextAlignment="Left" Text="{Binding}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn
Header="Query"
DisplayMemberBinding="{Binding Path=Query}" Width="Auto">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Width="Auto" TextAlignment="Left" Text="{Binding}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Actions">
<GridViewColumn.CellTemplate>
<DataTemplate>
<Button
Command="{Binding Path=DataContext.LookupReferencesCommand, RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type src:CreateWritingsViewModel}}}"
CommandParameter="{Binding .}"
Template="{StaticResource AddButtonTemplate}" Cursor="Hand" Width="30"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</StackPanel>
<HierarchicalDataTemplate x:Key="WritingsReferenceTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="200"/>
</Grid.ColumnDefinitions>
<GroupBox Header="{Binding Path=Hebrew}">
<StackPanel Margin="5 10 5 0">
<StackPanel>
<DockPanel>
<TextBlock Text="Writings of "/>
<AccessText Text="{Binding Path=Writings}" />
</DockPanel>
<DockPanel>
<TextBlock Text="Total Reference Chapters : "/>
<AccessText Text="{Binding Path=Chapters}" />
</DockPanel>
<DockPanel>
<TextBlock Text="Total Reference Verses : "/>
<AccessText Text="{Binding Path=Verses}" />
</DockPanel>
<DockPanel >
<TextBlock Text="Query for Writing : "/>
<AccessText Text="{Binding Path=QueryWriting}" />
</DockPanel>
<DockPanel >
<TextBlock Text="Query for Chapters : "/>
<AccessText Text="{Binding Path=QueryChapters}" />
</DockPanel>
</StackPanel>
<DockPanel Margin="0 5 0 0">
<GroupBox Header="Chapter References">
<Expander>
<ScrollViewer VerticalScrollBarVisibility="Auto" Height="200">
<HeaderedItemsControl
ItemTemplate="{StaticResource ChapterReferencesTemplate}"
ItemsSource="{Binding Path=ChapterReferences}"
Margin="10,0,0,0" />
</ScrollViewer>
</Expander>
</GroupBox>
</DockPanel>
</StackPanel>
</GroupBox>
</Grid>
<GroupBox Grid.Column="1" Header="CREATE REFERENCES">
<ListBox
Name="ReferenceListBox"
ItemTemplate="{StaticResource WritingsReferenceTemplate}"
ItemsSource="{Binding Path=odsDocumentsService.WritingsReferenceItems}"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
VirtualizingStackPanel.IsVirtualizing="False"
VirtualizingStackPanel.VirtualizationMode="Standard">
</ListBox>
In my HierarchicalDataTemplate x:Key="ChapterReferencesTemplate" as you can see I'm already binding to ItemsSource="{Binding Path=VerseReferences}" but I also need to bind to my ViewModel's CurrentVerseReference for the SelectedItem property of the ListView.
Same for my Button Command to my ViewModel's LookupReferencesCommand. All the data is coming from bindings to a object class that contains a ObservableCollection (ChapterReferences, VerseReferences) So far I'm having no success in getting this to work and would appreciate your help very much.
Thanks!...

Answer 1

Well, I found the right properties to use to get this to work. But, I need to do some reading to find out more about these property settings. For my SelectedItem I had to do this:
SelectedItem="{Binding Path=DataContext.CurrentVerseReference, RelativeSource={RelativeSource AncestorType={x:Type ListBox}}}"
And for my Button Command and CommandParameter I had to do this and this is where I need to do more reading to understand how this worked:
<Button Command="{Binding Path=DataContext.LookupReferencesCommand, RelativeSource={RelativeSource AncestorType={x:Type ListBox}, AncestorLevel=2, Mode=FindAncestor}}"
CommandParameter="{Binding Path=DataContext.CurrentVerseReference, RelativeSource={RelativeSource AncestorType={x:Type ListBox}, AncestorLevel=2, Mode=FindAncestor}}"
Template="{StaticResource AddButtonTemplate}" Cursor="Hand" Width="30"/>
Its the AncestorLevel I don't understand. I'm assuming its because I have the Button control at the second level of the ListView?