SUB - Subscript
The SUB element is used for subscripts.
Since SUB is inherently presentational,
it should not be relied upon to express a given meaning.
However, it can be useful for chemical formulas and
mathematical indices, where the subscript presentation is
helpful but not required. For example:
Chemical formulas include
H<SUB>2</SUB>O (water) and
C<SUB>21</SUB>H<SUB>27</sub>NO
(methadone). Let <VAR>x</VAR> =
<VAR>x<SUB>1</SUB></VAR>
+
<VAR>x<SUB>2</SUB></VAR>
+ ... +
<VAR>x<SUB>n</SUB></VAR>.
Maintained by Nick Grant < htmlstudio@talk21.com
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