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Detailed Specification

9. Program Segmentation

    [Disagreement with ANS]

    9.3.5
       An exception with extype 4301 may not be raised.
       This exception is raised on the program-line
      and not propagated to the chain-statement.
       An exception with extype 4303 shall not occur.

    [Implementation-defined]

    9.3.4
      The initial values of variables in a chained-to
      program are zero or the null string.

    [Memo]
       The program shown on 9.2.6 has an extra keyword "INTERNAL".
       Line 100 should be "100 DECLARE SUB S"