3.5.1 Zero Argument Macros

The most simple macro is a macro which does not accept any arguments. You might define the location of the company logo within a zero argument macro.

<al-macro name="small-logo">
<img src="http://images.company.com/logo/small.png">
</al-macro>

Then whenever you need to display the logo all you need to do is expand the macro.

<al-expand name="small-logo"/>

This allows you to define the location and name of your company logo in one place.