• The comparison of two index-names is actually the comparison of the corresponding occurrence numbers.

• In the comparison of an index-name with a data item (other than an index data item), or in the comparison of an index-name with a literal, the occurrence number that corresponds to the value of the index-name is compared with the data item or literal.

• X In the comparison of an index-name with an arithmetic expression, the
  X occurrence number that corresponds to the value of the index-name is
  X compared with the arithmetic expression.
  
  X Since an integer function can be used wherever an arithmetic
  X expression can be used, this extension allows you to compare an
  X index-name to an integer or numeric function.

• In the comparison of an index data item with an index-name or another index data item, the actual values are compared without conversion. Results of any other comparison involving an index data item are undefined.

Table 26. Comparisons for Index-Names and Index Data Items
X  Operands    X  Compared	X              X  Index-Name	X  Index Data   X  Item	Data-Name    (Numeric    X  Integer     X  Only)	Literal      (Numeric    X  Integer     X  Only)	X  Arithmetic  X  Expression
X  Index-Name  X              X              X              X              X	X  Compare     X  occurrence  X  number      X              X              X	X  Compare      X  without      X  conversion   X               X               X	X  Compare     X  occurrence  X  number      X  with        X  data-name   X	X  Compare     X  occurrence  X  number      X  with        X  literal     X	X  Compare     X  occurrence  X  number      X  with        X  arithmetic  X  expression
X  Index Data   Item	X  Compare      without      conversion	X  Compare       without       conversion	X  Illegal	X  Illegal	X  Illegal

IBM Library Server Copyright 1989, 2005 IBM Corporation. All rights reserved.

Adobe, the Adobe logo, Acrobat, the Acrobat logo, and Acrobat Reader are registered trademarks of Adobe Systems incorporated.