All elements allocated by a single storage definition statement must be of the same type (bytes, words, or doublewords). It is desirable, especially in business data processing applications, for a variable to have several fields, with each field having its own type.
Figure 3-59 Fields in a typical personnel record data structure.
A structure definition gives the pattern of the structure and may have the simplified form
Structure name STRUC
.
. Sequence of DB, DW, and DD directives
.
Structure name ENDS
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If a DB, DW, or DD statement includes a variable identifier, it denotes the beginning of a field and is referred to as a field identifier.
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