mixing different direction labels within same domain

Abdulrahman I. ALGhadir aghadir at citc.gov.sa
Tue Jun 21 07:55:39 CEST 2011

Dear all,
I am just wondering whenever it is permitted or not to have this case:
<r2l chars><num1>.<num2>.<etc ..>
As you know in case r2l labels the display will be like this
<etc..>.<num1>.<num2><r2l chars>
As you see both of them have different display order which isn't  the same as network order.
And I know it is mentioned in the RFC

   Several stronger statements were considered and rejected, because

   they seem to be impossible to fulfill within the constraints of the

   Unicode bidirectional algorithm.

And one of the statement is

  o  The sequence of labels should be consistent with network order.
      This proved impossible -- a domain name consisting of the labels
      in network order) L1.R2.R3.L4 will be displayed as L1.R3.R2.L4 in
      an LTR context.  (In an RTL context, it will be displayed as

And I have tried two implemented tools (well I don't know if they follow the RFC fully or not).



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