Defining Your Own Collating Sequence

You can define a customized collating sequence unique to your application. For example, in the section "Collating Sequences" in Chapter 2, an example was used where an accountant wanted the special character $ to follow the D in the collating sequence. This makes it possible to have $ INVENTORY follow DOLLAR INVENTORY but come before other entries, such as EXPENSES.

To alter the standard sequence so $ INVENTORY follows DOLLAR INVENTORY, but comes before EXPENSES, enter the following commands:

:SORT  
 
HP32214A.01.00  SORT/3000 WED, JUN  3, 1987,  9:30 AM 
© HEWLETT-PACKARD CO. 1986 
 
>DATA IS ASCII, SEQUENCE IS ASCII  
>ALTSEQ MERGE "D" = "$"  
>SHOW SEQUENCE  
 
     nul soh stx etx eot enq ack bel  bs  ht  lf  vt  ff  cr  so  si 
     del dc1 dc2 dc3 dc4 nak syn etb can  em sub esc  fs  gs  rs  us 
      sp   !   "   #   %   &   '   (   )   *   +   ,   -   .   /   0 
       1   2   3   4   5   6   7   8   9   :   ;   <   =   >   ?   @ 
       A   B   C   D   $   E   F   G   H   I   J   K   L   M   N   O 
       P   Q   R   S   T   U   V   W   X   Y   Z   [   \   ]   ^   _ 
       `   a   b   c   d   e   f   g   h   i   j   k   l   m   n   o 
       p   q   r   s   t   u   v   w   x   y   z   {   |   }   ~ del

The following example shows the results of the sort with and without altering the collating sequence for the entries $ INVENTORY, DOLLAR INVENTORY, and EXPENSES:

        SORT WITH ALTERED            SORT WITH STANDARD 
            SEQUENCE                      SEQUENCE 
 
        DOLLAR INVENTORY             DOLLAR INVENTORY 
        $ INVENTORY                  EXPENSES 
        EXPENSES                     $ INVENTORY

A commonly used alteration to the standard ASCII collating sequence is merging upper case and lower case alphabetic characters. In the standard collating sequence, all upper case characters precede all lower case characters. The standard ASCII collating sequence is shown in the section, "Using >SHOW to Display the Collating Sequence". To order alternating upper case and lower case characters, enter the following commands:

:SORT   
 
HP32214A.01.00  SORT/3000 WED, JUN  3, 1987,  9:45 AM 
© HEWLETT-PACKARD CO. 1986 
 
>DATA IS ASCII, SEQUENCE IS ASCII  
>ALTSEQ MERGE "A-Z" with "a-z"  
>SHOW SEQUENCE  
 
     nul soh stx etx eot enq ack bel  bs  ht  lf  vt  ff  cr  so  si 
     del dc1 dc2 dc3 dc4 nak syn etb can  em sub esc  fs  gs  rs  us 
      sp   !   "   #   $   %   &   '   (   )   *   +   ,   -   .   / 
       0   1   2   3   4   5   6   7   8   9   :   ;   <   +   >   ? 
       @   A   a   B   b   C   c   D   d   E   e   F   f   G   g   H 
       h   I   i   J   j   K   k   L   l   M   m   N   n   O   o   P 
       p   Q   q   R   r   S   s   T   t   U   u   V   v   W   w   X 
       x   Y   y   Z   z   [   \   ]   ^   _   `   {   |   }   ~ del

For additional information on altering collating sequences, refer to the >ALTSEQ command in Chapter 6.

Defining Your Own Collating Sequence

Technical documentation

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