Fiori Master Detail Incorrect aggregation node for controll.

Hello,

I am really new to SAPUI5 and Fiori so please forgive me if I am just overlooking things.

I am using the Fiori Master Detail Template and am trying to insert my own content into the <semantic:content> of the Detail.view. Some things work <Text> or <List> for example but many others that are in the sap.ui.core.Control (which is stated as the possible contents) do not work.

What do I have to look after or what am I forgetting. So far I have only edited the Master so the Detail is basically untuched.

With Regards

Mathias