What does a qualified name mean for a module?

[Jayaprakash Artanareeswaran]

Hello,


The newly introduced ModuleElement has two APIs to get a module's name, namely 
getQualifiedName() and getSimpleName(). The JLS, though says a module only has 
one name.


"A module name consists of one or more Java identifiers (§3.8) separated by "."
tokens."


I also see this in the "JPMS: Modules in the Java Language and JVM":

ModuleName:
  Identifier
  ModuleName . Identifier

I am not really sure what a qualifier for a module is. In the given example

Module M.N {}

are 'M' and 'N' separate names and if so, what do they denote?

Jay