By the documentation, we are able to associate a collection to a Content Fragment, but, we are not able to publish it. How to publish a collection that is attached to a content fragment, and all itens within it?
I understand what you mean. The problem is that it states in the dropdown list: "Associated Content". From my view, it mislead the developer and the user to use it as a real Associated Content. Should it be called Content for Reference or so, would make more sense.
In this case, how can the user create a fragment with, for instance, image that gets published?
For now, we are customizing the Metadata area to accept the real Associated Content, but the users did not buy the idea that the current Associated Content is really just for organization purposes.
The main purpose of using a collection with fragments is when authoring the page, the user has access to these associated assets from the content browser on the left hand side.
The assets themselves can be published independently.
I am not sure if the naming of these actions can be made better, I can relay your comments. But to me, content implies physical assets, whereas a collection is a virtual set of assets. It is debatable though