When customizing XAMLs in UBIK you have the possibility to access the other levels of data throughout the hierarchy, such as accessing the children or documents below children in a view. However, this functionality is often misused, impacting performance. This article provides an introduction to NextLevel (and similar [[XAML_Basics#Bindings|bindings]]), as well as outlines the correct usage in order to mitigate performance issues.
{{Hint|The following sections are described using NextLevel as this is the most common binding, however, other similar hierarchy manipulations exist, such as ParentLevel or LinkedLevel, which shall be individually described further on.}}