<br>
Over time, these viewmodels evolve to meet the needs of projects and customers. For example, with the release of UBIK 4.0, the Properties collections were moved to the ContentViewModel (thereby being made available on all derived viewmodels) after customizing of items to present specific Property values (previously requiring NextLevel bindings) became more common.
<br>
[[File:ContentViewModeldiagram.jpg|800px]]