{RelativeSource Self}
and {RelativeSource TemplatedParent}
as compared to more powerful expressions in WPF like {RelativeSource PreviousData}
or {Binding RelativeSource={RelativeSource Mode=PreviousData, AncestorType={x:Type TextBox}}
.{Binding DateValue, StringFormat=Date: {0:dddd yyyy-MM-dd}}
isn't supported in UWP and requires custom converters.BasedOn={StaticResource {x:Type TextBlock}
isn't supported in UWP but works in WPF. Instead, BasedOn requires the use of a key which is a problem as not all default styles define one. This is a specific example of the missing x:Type markup extension in UWP.<ListBox.ItemsSource><x:Array><s:string>foo<s/:string><x/:Array></ListBox.ItemsSource>
works in WPF but not in UWP.