== Feature related ==
=== Content filtering ===
For the Xamarin clients, an "SfDataSourceExt" type is available for filtering list of items using defined expressions.<br />
The following example demonstrates how to filter for child items having certain property values. The filtered list and its count can be displayed in the UI.<br />
<syntaxhighlight lang="xml">
<ContentView
xmlns:controls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL"
...>
<ContentView.Resources>
<ResourceDictionary>
<x:String x:Key="Expresssion">Item.Values["MP_YEAR"].Contains("2019")</x:String>
<controls:SfDataSourceExt x:Key="FilteredList" Expression="{StaticResource Expresssion}" ItemsSource="{Binding Children.Items}"/>
</ResourceDictionary>
</ContentView.Resources>
<StackLayout Orientation="Vertical">
<Label Text="{Binding DisplayItemsCount, Source={StaticResource FilteredList}}" />
<controls:SfListViewExt ItemsSource="{Binding DisplayItems, Source={StaticResource FilteredList}}" />
</StackLayout>
</ContentView>
</syntaxhighlight>
=== Search ===