Just to be sure we mean the same thing. This syntax describes what I am trying to achieve: 
package this_package can not be reentered;

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Your is also or is instead seems to indicate creating aliases for a namespace. I like that idea a lot--in a few languages I wished I could simply capture intention during prototyping by: 
class ID_NUMBER is INT;

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and settle details later.

Be well,
rir

In reply to Re^2: Namespaces contiguous in the entirety by rir
in thread Namespaces contiguous in the entirety by rir

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