KEY

 The KEY attribute can be applied to record  fields  to  indicate
 that  the  field is to be used as a key field when the record is
 part of an indexed file.

 Syntax:

    KEY [[( n [[, {options},... ]] )]]
    KEY [[( {options},... )]]

 The 'n' represents the key number.  A key number of 0  indicates
 that  the field is the primary key of the record.  All other key
 numbers indicate alternate keys.   The  key  number  must  be  a
 constant  expression  that denotes an integer value in the range
 from 0 through 254.

 See the "HP Pascal Language Reference Manual" for  the  complete
 description of using the KEY attribute.

Additional information available:

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