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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"