Maven: how to get files to show up in Projects view

I'm a great believer in Maven and I try to follow the Maven conventions to
the letter. This includes the so called Standard Locations. (
http://maven.apache.org/guides/introduction/introduction-to-the-standard-directory-layout.html
)

When I do this there are certain files I can only get to by going to the
Files view.

For example:  Assemblies.    According to the convention they should live
in src/assembly but that will effectively hide them from the Projects view.
I would have expected them to show up under "Other Sources" in Projects
view.  Had I put my assemblies instead under src/main/assembly then it
would have worked, but alas that's not the convention.

Is this intentional design in the IDE ?   Or just me having misunderstood.