[sv-ec] why classes are skipped in name space definition in SV LRM

LRM chapter 19.13. Name spaces - says nothing about classes (and type names
defined with typedef). It was forgotten to add rules for classes here or
classes are skiiped on purpose.
 
I'm not sure if class name is in the same space like module name?
 
Is below code it legal or not?
  class a;
   int b;
  endclass

  typedef a A;

  module a ();
   A v;
  endmodule
 
Same question about typedef:
typedef int a;
module a;
endmodule
 
 
DANiel
 

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