SIMSCRIPT II.5 Programming Language

SIMSCRIPT II.5 Programming Language
reserve F.TABLE, L.TABLE, N.TABLE and MATRIX as N by M
must be executed.
4.7 Attribute Definitions: Mode and Dimensionality
Attributes of the system, and of permanent and temporary entities, may be declared to have any of
the modes associated with variables. As with any global or local variables, modes can be declared
by default, using normally statements, and explicitly, using define statements. Set pointers are
automatically declared to be of integer mode.
Permanent and temporary entity declarations define the dimensionality of their attributes implicitly,
making additional definitions unnecessary. The statement:
every PERSON has an AGE
declares that AGE has a single subscript, a pointer value if PERSON is declared as temporary, or an
index value if PERSON is permanent. The notation AGE(PERSON), meaning AGE of PERSON,
provides for this subscript. System attributes, on the other hand, must be declared and reserved as
explained in paragraph 4.6.
The rules for assigning modes and dimensionalities to attributes are straight forward.
Mode:
1. The current "background mode" is assigned to all attributes specified in every and the
system statements except for automatically-generated set pointers.
2. Define statements following every and the system statements can redefine attribute
modes.
Dimensionality:
1. The current "background dimensionality" is assigned to all attributes and sets specified in
the system statements.
2. Every statements specify the dimensionality of the attributes and sets listed in them.
The following preamble illustrates each of these rules.
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