Inner Content
Content Blocks are usually added to pages as Dnn Modules. But there is another way: as Inner Content. What this means is that a Content Item like a Blog-Post says "Show this other content-block right...here". To help 2sxc keep track of what is used where, this relationship is stored as a Content Block Reference.
![](../../../pages/basics/cms/content-blocks/assets/content-block-reference.png)
Inner Content from Another App
Usually an App is self-contained, so everything it shows comes from the same App. This also means that exporting/importing an app will result in the same stuff arriving at the destination.
The following diagram shows how Content can come from multiple apps
![](../../../pages/basics/cms/content-blocks/assets/content-block-reference-other-app.png)
Important
So if you're using Inner Content and referencing content from another App, this crosses the borders between apps, and you'll need to export/import both Apps to get the same result.