Editing Module:Road data/strings/doc (section)

===Aliasing===
There are two ways to define a type as an alias. If the type is defined within the module, simply set the new type as equal to the type being aliased, as shown above (from [[Module:Road data/strings/HKG]]):
<syntaxhighlight lang="lua">
HKG.Route = {
	shield = "HK Route%route%.svg",
	link = "Route %route% (Hong Kong)",
	abbr = "Route&nbsp;%route%"
}

HKG.route = HKG.Route
</syntaxhighlight>

If the type is defined in a separate module, such as a state highway type being used in another state's module, a special syntax may be used to refer to that module (from [[Module:Road data/strings/USA/NJ]]):
<syntaxhighlight lang="lua">
NJ.NY = {alias = {module = "USA/NY", type = "NY"}}
</syntaxhighlight>

This code sets the <code>NY</code> type as a link to the <code>NY</code> type in [[Module:Road data/strings/USA/NY]]. The parser will import that module and process the type as if the original module had declared it itself. The alias declaration may not add or override any data in the type table it points to.