Android : Enclose layout as an inner content of a bigger layout

I have a basic container layout in which inside it I have a FrameLayout with an id @android:id/content. This FrameLayout meant for other layouts to fill it.

Now my question is this:

Lets say I have a layout file content.xml which I want it's content to fill the said FrameLayout.Is there a way to do all this in XML?

I want something like the <include> tag, but the exact opposite. Call it <included-in>.

Is there such a thing or way to achieve it, or do I have to inflate them both, and insert the content in code?

Thanks!