1 ALIGNED

 The ALIGNED field attribute clause aligns  a  field  on  a  specified
 starting boundary relative to the start of the record.

2 Usage Notes

  o  To satisfy hardware requirements,  some  languages  and  language
     processors   have   field   alignment   restrictions   for   data
     definitions.  The ALIGNED  clause  enables  you  to  control  the
     starting boundaries of fields you define.

  o  All fields, except BIT fields, begin by default on the first byte
     following   the   last  field.   BIT  fields  begin  on  the  bit
     immediately following  the  last  field.   You  can  modify  this
     starting position with the ALIGNED clause.

  o  The ALIGNED clause aligns fields within a record relative to  the
     start  of  the  record, not relative to virtual memory locations.
     For example, if you specify LONGWORD alignment for a field,  that
     field  does  not  necessarily  begin  on  a  longword boundary in
     memory.  Rather, the field begins some multiple of 32 bits beyond
     the  start  of  the record.  To correctly use the ALIGNED clause,
     you must know the memory alignment techniques of the language you
     use with the CDD.

  o  You should not use the ALIGNED clause in template records.   When
     CDDL stores the template record, the position of an aligned field
     is fixed within the record and is not changed when the record  is
     copied  into  another  record  definition.   Therefore, the newly
     created  field  may  not  align  properly  in  the   new   record
     definition.


2 Example

 In the following example, a LONGWORD field (QUANTITY) follows a  BYTE
 field.   The  PRODUCT_NO  field spans 64 bits, the DATE_ORDERED field
 spans 64 bits, and the STATUS_CODE field spans 8 bits.   The  ALIGNED
 clause  causes  the three bytes following STATUS_CODE to remain empty
 and aligns QUANTITY exactly 160 bits beyond the start of the record.

 IN_STOCK STRUCTURE.
     PRODUCT_NO     DATATYPE IS TEXT
                    SIZE IS 8 CHARACTERS.
     DATE_ORDERED   DATATYPE IS DATE.
     STATUS_CODE    DATATYPE IS BYTE.
     QUANTITY       DATATYPE IS LONGWORD
                    ALIGNED ON LONGWORD.
     LOCATION       ARRAY 1:4
                    DATATYPE IS TEXT 
                    SIZE IS 30 CHARACTERS.
     UNIT_PRICE     DATATYPE IS LONGWORD SCALE -2.
 END IN_STOCK STRUCTURE.