Editing Module:Convert/documentation/conversion data/introduction (section)

=== Alias ===
Some unit codes are an alias for another spelling of the unit code. For example, the code <code>ft2</code> is an alias for <code>sqft</code>, and that is indicated by entering <code>=sqft</code> in the Symbol column for the <code>ft2</code> entry. An alias can only be entered after the primary unit has been defined (the <code>sqft</code> entry must precede the <code>ft2</code> entry).

Normally there are no other entries on an alias line, however, the following may be used:
*<code>abbr=off</code> to specify that using the alias displays the name of the unit, not the symbol
*<code>default = ''unit code''</code> to specify that the alias has a default output that is different from the primary unit
*<code>link = ''link text''</code> to specify that the alias has a link that is different from the primary unit
*<code>multiplier = ''number''</code> used as "multiplier = 100" with unit code <code>100km</code> to define a unit that is 100 times the size of a kilometre
*<code>sp=us</code> to specify that using the alias forces US spelling for that unit
*<code>symbol = ''symbol text''</code> to specify that the alias has a symbol that is different from the primary unit
*<code>symlink = ''link text''</code> to specify that the alias has a different link when abbreviated ("symbol link")