RULE XXIII--MULTIPURPOSE INDICATOR
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Multipurpose Indicator "
§177. Use of the Multipurpose Indicator: The multipurpose indicator must be used in the situations below for the specific purposes described and, when used in these situations, it must not be regarded as the base-line indicator:
i.
The multipurpose indicator must be used before a modified expression as an
indication to the reader of impending modification. See Rule XIV for additional information and examples.
ii. The
multipurpose indicator must be used between a letter and a succeeding numeric
symbol to indicate that the corresponding numeral is not a subscript to the
corresponding letter. However, when the letter represents a numeral in a
numeration system to a base other than 10, it must be regarded as a numeral
and, accordingly, the multipurpose indicator must not be used.
iii. The
multipurpose indicator must be used between a numeric subscript and a numeral,
if the latter is on the base line.
(1)
c0"10^2"+c1"10+c2
|
verbose semantics |
c Subscript
0 Baseline
10 squared plus c Subscript
1 Baseline
10 plus c Subscript
2 |
|
(2)
#2n1"5^-3_/2"-n2"5^-1_/2
|
verbose semantics |
2 n Subscript
1 Baseline
5 Superscript
minus 3 slash 2 Baseline
minus n Subscript
2 Baseline
5 Superscript
minus 1 slash 2 |
|
iv. The
multipurpose indicator must be used between two symbols of comparison to
indicate that the corresponding signs of comparison are printed horizontally
and not vertically (see §149).
v. The
multipurpose indicator must be used after the decimal point symbol to indicate
that the symbol which follows it is not numeric unless that symbol is the comma
or the punctuation indicator.
(3)
?1/3# .k ."=
(the general omission symbol represents a question mark over
a dash in ink print)
|
verbose semantics |
one-third equals period large-dash Overscript
question-mark EndScripts
|
|
vi. The
multipurpose indicator must be used between a tally mark and the punctuation
indicator.
(1)
_____, ____"_4
(in ink print, the first group of tallies has a cross
tally)
|
verbose semantics |
CrossOut
vertical-line vertical-line vertical-line vertical-line EndCrossOut
comma vertical-line vertical-line vertical-line vertical-line period |
|
vii. The
multipurpose indicator must be used between two vertical bars of which the
first is a closing grouping symbol and the second is an opening grouping
symbol. It must also be used between two vertical bars which are grouping
symbols of which one is shorter and/or thicker than the other.
(1)
\x\"\y\
|
verbose semantics |
StartAbsoluteValue
x EndAbsoluteValue
StartAbsoluteValue
y EndAbsoluteValue
|
|
(2)
\\x\\"\\y\\
|
verbose semantics |
double-vertical-line x double-vertical-line double-vertical-line y double-vertical-line |
|
(3)
\\"\x\"\\
|
verbose semantics |
double-vertical-line StartAbsoluteValue
x EndAbsoluteValue
double-vertical-line |
|
(4)
\x\"\;x ;.k #0
|
verbose semantics |
StartAbsoluteValue
x EndAbsoluteValue
vertical-line Subscript
x equals 0 |
|
viii. The
multipurpose indicator must be used between an operation symbol when it is
represented by a symbol for a regular polygon and a numeral which follows.
ix. The
multipurpose indicator must be used between two symbols for the tilde to
indicate that they are written horizontally, one after the other.
